1671655711 has 4 divisors (see below), whose sum is σ = 1823624424. Its totient is φ = 1519687000.

The previous prime is 1671655703. The next prime is 1671655717. The reversal of 1671655711 is 1175561761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1175561761 = 11 ⋅106869251.

It is a cyclic number.

It is not a de Polignac number, because 1671655711 - 2³ = 1671655703 is a prime.

It is a super-2 number, since 2×1671655711² = 5588865632237831042, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1671655717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75984340 + ... + 75984361.

It is an arithmetic number, because the mean of its divisors is an integer number (455906106).

Almost surely, 2^1671655711 is an apocalyptic number.

1671655711 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1671655711 is a deficient number, since it is larger than the sum of its proper divisors (151968713).

1671655711 is a wasteful number, since it uses less digits than its factorization.

1671655711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151968712.

The product of its digits is 44100, while the sum is 40.

The square root of 1671655711 is about 40885.8864524178. The cubic root of 1671655711 is about 1186.8129562405.

It can be divided in two parts, 16716 and 55711, that added together give a palindrome (72427).

The spelling of 1671655711 in words is "one billion, six hundred seventy-one million, six hundred fifty-five thousand, seven hundred eleven".