664742474 has 16 divisors (see below), whose sum is σ = 1145011680. Its totient is φ = 286252560.

The previous prime is 664742473. The next prime is 664742489. The reversal of 664742474 is 474247466.

It is not an unprimeable number, because it can be changed into a prime (664742473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 794729 + ... + 795564.

It is an arithmetic number, because the mean of its divisors is an integer number (71563230).

Almost surely, 2^664742474 is an apocalyptic number.

664742474 is a deficient number, since it is larger than the sum of its proper divisors (480269206).

664742474 is a wasteful number, since it uses less digits than its factorization.

664742474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1590325.

The product of its digits is 903168, while the sum is 44.

The square root of 664742474 is about 25782.6002179765. The cubic root of 664742474 is about 872.7391862635.

The spelling of 664742474 in words is "six hundred sixty-four million, seven hundred forty-two thousand, four hundred seventy-four".