664252674 has 24 divisors (see below), whose sum is σ = 1333767120. Its totient is φ = 220543752.

The previous prime is 664252643. The next prime is 664252681. The reversal of 664252674 is 476252466.

It is a super-2 number, since 2×664252674² = 882463229832300552, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 772857 + ... + 773715.

It is an arithmetic number, because the mean of its divisors is an integer number (55573630).

Almost surely, 2^664252674 is an apocalyptic number.

664252674 is an abundant number, since it is smaller than the sum of its proper divisors (669514446).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664252674 is an equidigital number, since it uses as much as digits as its factorization.

664252674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1582 (or 1223 counting only the distinct ones).

The product of its digits is 483840, while the sum is 42.

The square root of 664252674 is about 25773.0998135653. The cubic root of 664252674 is about 872.5247810850.

The spelling of 664252674 in words is "six hundred sixty-four million, two hundred fifty-two thousand, six hundred seventy-four".