651653660 has 24 divisors (see below), whose sum is σ = 1563969120. Its totient is φ = 223424064.

The previous prime is 651653633. The next prime is 651653669. The reversal of 651653660 is 66356156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651653669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2327195 + ... + 2327474.

It is an arithmetic number, because the mean of its divisors is an integer number (65165380).

Almost surely, 2^651653660 is an apocalyptic number.

It is an amenable number.

651653660 is an abundant number, since it is smaller than the sum of its proper divisors (912315460).

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

651653660 is a wasteful number, since it uses less digits than its factorization.

651653660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4654685 (or 4654683 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 38.

The square root of 651653660 is about 25527.5079081371. The cubic root of 651653660 is about 866.9730806735.

The spelling of 651653660 in words is "six hundred fifty-one million, six hundred fifty-three thousand, six hundred sixty".