660621036 has 48 divisors (see below), whose sum is σ = 1597288448. Its totient is φ = 212284800.

The previous prime is 660621023. The next prime is 660621041. The reversal of 660621036 is 630126066.

It is a junction number, because it is equal to n+sod(n) for n = 660620994 and 660621012.

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, 97536 + ... + 104088.

Almost surely, 2^660621036 is an apocalyptic number.

It is an amenable number.

660621036 is an abundant number, since it is smaller than the sum of its proper divisors (936667412).

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

660621036 is a wasteful number, since it uses less digits than its factorization.

660621036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6862 (or 6860 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 660621036 is about 25702.5492120918. The cubic root of 660621036 is about 870.9317695879.

The spelling of 660621036 in words is "six hundred sixty million, six hundred twenty-one thousand, thirty-six".