725576664 has 32 divisors (see below), whose sum is σ = 1827000000. Its totient is φ = 240117792.

The previous prime is 725576651. The next prime is 725576717. The reversal of 725576664 is 466675527.

It is a super-2 number, since 2×725576664² = 1052922990682737792, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105414 + ... + 112085.

It is an arithmetic number, because the mean of its divisors is an integer number (57093750).

Almost surely, 2^725576664 is an apocalyptic number.

It is an amenable number.

725576664 is an abundant number, since it is smaller than the sum of its proper divisors (1101423336).

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

725576664 is a wasteful number, since it uses less digits than its factorization.

725576664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217647 (or 217643 counting only the distinct ones).

The product of its digits is 2116800, while the sum is 48.

The square root of 725576664 is about 26936.5302888104. The cubic root of 725576664 is about 898.5890088023.

The spelling of 725576664 in words is "seven hundred twenty-five million, five hundred seventy-six thousand, six hundred sixty-four".