1671660011 has 4 divisors (see below), whose sum is σ = 1910468592. Its totient is φ = 1432851432.

The previous prime is 1671659947. The next prime is 1671660017. The reversal of 1671660011 is 1100661761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1100661761 = 4951 ⋅222311.

It is a cyclic number.

It is not a de Polignac number, because 1671660011 - 2⁶ = 1671659947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1671660017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119404280 + ... + 119404293.

It is an arithmetic number, because the mean of its divisors is an integer number (477617148).

Almost surely, 2^1671660011 is an apocalyptic number.

1671660011 is a deficient number, since it is larger than the sum of its proper divisors (238808581).

1671660011 is an equidigital number, since it uses as much as digits as its factorization.

1671660011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238808580.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 1671660011 is about 40885.9390377670. The cubic root of 1671660011 is about 1186.8139738526.

The spelling of 1671660011 in words is "one billion, six hundred seventy-one million, six hundred sixty thousand, eleven".