674664257 has 8 divisors (see below), whose sum is σ = 679104000. Its totient is φ = 670238464.

The previous prime is 674664173. The next prime is 674664269. The reversal of 674664257 is 752466476.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 674664257 - 2²⁶ = 607555393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (674664157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104168 + ... + 110454.

It is an arithmetic number, because the mean of its divisors is an integer number (84888000).

Almost surely, 2^674664257 is an apocalyptic number.

It is an amenable number.

674664257 is a deficient number, since it is larger than the sum of its proper divisors (4439743).

674664257 is a wasteful number, since it uses less digits than its factorization.

674664257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6975.

The product of its digits is 1693440, while the sum is 47.

The square root of 674664257 is about 25974.2999328182. The cubic root of 674664257 is about 877.0598575675.

The spelling of 674664257 in words is "six hundred seventy-four million, six hundred sixty-four thousand, two hundred fifty-seven".