651000656 has 10 divisors (see below), whose sum is σ = 1261313802. Its totient is φ = 325500320.

The previous prime is 651000617. The next prime is 651000661. The reversal of 651000656 is 656000156.

It can be written as a sum of positive squares in only one way, i.e., 625800256 + 25200400 = 25016^2 + 5020^2 .

It is a super-2 number, since 2×651000656² = 847603708224860672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20343755 + ... + 20343786.

Almost surely, 2^651000656 is an apocalyptic number.

It is an amenable number.

651000656 is a deficient number, since it is larger than the sum of its proper divisors (610313146).

651000656 is a wasteful number, since it uses less digits than its factorization.

651000656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40687549 (or 40687543 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 651000656 is about 25514.7144996765. The cubic root of 651000656 is about 866.6833940230.

The spelling of 651000656 in words is "six hundred fifty-one million, six hundred fifty-six", and thus it is an aban number.