664724753 has 12 divisors (see below), whose sum is σ = 835027200. Its totient is φ = 517966680.

The previous prime is 664724743. The next prime is 664724761. The reversal of 664724753 is 357427466.

It is not a de Polignac number, because 664724753 - 2⁴ = 664724737 is a prime.

It is a super-2 number, since 2×664724753² = 883717994501822018, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (664724743) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 391553 + ... + 393246.

It is an arithmetic number, because the mean of its divisors is an integer number (69585600).

Almost surely, 2^664724753 is an apocalyptic number.

It is an amenable number.

664724753 is a deficient number, since it is larger than the sum of its proper divisors (170302447).

664724753 is a wasteful number, since it uses less digits than its factorization.

664724753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784828 (or 784817 counting only the distinct ones).

The product of its digits is 846720, while the sum is 44.

The square root of 664724753 is about 25782.2565536844. The cubic root of 664724753 is about 872.7314309050.

The spelling of 664724753 in words is "six hundred sixty-four million, seven hundred twenty-four thousand, seven hundred fifty-three".