625131660 has 48 divisors (see below), whose sum is σ = 1779073632. Its totient is φ = 163968000.

The previous prime is 625131653. The next prime is 625131679. The reversal of 625131660 is 66131526.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81741 + ... + 89060.

It is an arithmetic number, because the mean of its divisors is an integer number (37064034).

Almost surely, 2^625131660 is an apocalyptic number.

625131660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

625131660 is an abundant number, since it is smaller than the sum of its proper divisors (1153941972).

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

625131660 is a wasteful number, since it uses less digits than its factorization.

625131660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170874 (or 170872 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 625131660 is about 25002.6330613398. The cubic root of 625131660 is about 855.0480052387.

The spelling of 625131660 in words is "six hundred twenty-five million, one hundred thirty-one thousand, six hundred sixty".