7971656 has 32 divisors (see below), whose sum is σ = 18636480. Its totient is φ = 3105600.

The previous prime is 7971643. The next prime is 7971679. The reversal of 7971656 is 6561797.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5855 + ... + 7086.

It is an arithmetic number, because the mean of its divisors is an integer number (582390).

Almost surely, 2^7971656 is an apocalyptic number.

It is an amenable number.

7971656 is an abundant number, since it is smaller than the sum of its proper divisors (10664824).

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

7971656 is a wasteful number, since it uses less digits than its factorization.

7971656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12965 (or 12961 counting only the distinct ones).

The product of its digits is 79380, while the sum is 41.

The square root of 7971656 is about 2823.4121201128. The cubic root of 7971656 is about 199.7635204974.

The spelling of 7971656 in words is "seven million, nine hundred seventy-one thousand, six hundred fifty-six".