1677663671 has 4 divisors (see below), whose sum is σ = 1698900000. Its totient is φ = 1656427344.

The previous prime is 1677663661. The next prime is 1677663679. The reversal of 1677663671 is 1763667761.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1677663671 - 2¹⁴ = 1677647287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1677663679) 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, 10618046 + ... + 10618203.

It is an arithmetic number, because the mean of its divisors is an integer number (424725000).

Almost surely, 2^1677663671 is an apocalyptic number.

1677663671 is a deficient number, since it is larger than the sum of its proper divisors (21236329).

1677663671 is an equidigital number, since it uses as much as digits as its factorization.

1677663671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21236328.

The product of its digits is 1333584, while the sum is 50.

The square root of 1677663671 is about 40959.2928527825. The cubic root of 1677663671 is about 1188.2330651712.

The spelling of 1677663671 in words is "one billion, six hundred seventy-seven million, six hundred sixty-three thousand, six hundred seventy-one".