7661656 has 16 divisors (see below), whose sum is σ = 14480640. Its totient is φ = 3800160.

The previous prime is 7661639. The next prime is 7661663. The reversal of 7661656 is 6561667.

It is a happy number.

It is an Ulam number.

It is a pancake number, because a pancake can be divided into 7661656 parts by 3914 straight cuts.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 2755 + ... + 4786.

It is an arithmetic number, because the mean of its divisors is an integer number (905040).

Almost surely, 2^7661656 is an apocalyptic number.

It is an amenable number.

7661656 is a deficient number, since it is larger than the sum of its proper divisors (6818984).

7661656 is a wasteful number, since it uses less digits than its factorization.

7661656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7674 (or 7670 counting only the distinct ones).

The product of its digits is 45360, while the sum is 37.

The square root of 7661656 is about 2767.9696530128. The cubic root of 7661656 is about 197.1397567050.

The spelling of 7661656 in words is "seven million, six hundred sixty-one thousand, six hundred fifty-six".