651668916 has 48 divisors (see below), whose sum is σ = 1603022400. Its totient is φ = 205477632.

The previous prime is 651668881. The next prime is 651668929. The reversal of 651668916 is 619866156.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 182686 + ... + 186218.

It is an arithmetic number, because the mean of its divisors is an integer number (33396300).

Almost surely, 2^651668916 is an apocalyptic number.

It is an amenable number.

651668916 is an abundant number, since it is smaller than the sum of its proper divisors (951353484).

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

651668916 is a wasteful number, since it uses less digits than its factorization.

651668916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4368 (or 4366 counting only the distinct ones).

The product of its digits is 466560, while the sum is 48.

The square root of 651668916 is about 25527.8067212990. The cubic root of 651668916 is about 866.9798462500.

It can be divided in two parts, 651 and 668916, that multiplied together give a triangular number (435464316 = T₂₉₅₁₁).

The spelling of 651668916 in words is "six hundred fifty-one million, six hundred sixty-eight thousand, nine hundred sixteen".