725781660 has 48 divisors (see below), whose sum is σ = 2065513632. Its totient is φ = 190368000.

The previous prime is 725781653. The next prime is 725781671. The reversal of 725781660 is 66187527.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 95491 + ... + 102810.

It is an arithmetic number, because the mean of its divisors is an integer number (43031534).

Almost surely, 2^725781660 is an apocalyptic number.

It is an amenable number.

725781660 is an abundant number, since it is smaller than the sum of its proper divisors (1339731972).

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

725781660 is a wasteful number, since it uses less digits than its factorization.

725781660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198374 (or 198372 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 725781660 is about 26940.3351872244. The cubic root of 725781660 is about 898.6736264663.

The spelling of 725781660 in words is "seven hundred twenty-five million, seven hundred eighty-one thousand, six hundred sixty".