7661856 has 24 divisors (see below), whose sum is σ = 20112624. Its totient is φ = 2553920.

The previous prime is 7661851. The next prime is 7661881. The reversal of 7661856 is 6581667.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (7661851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39810 + ... + 40001.

It is an arithmetic number, because the mean of its divisors is an integer number (838026).

Almost surely, 2^7661856 is an apocalyptic number.

It is an amenable number.

7661856 is an abundant number, since it is smaller than the sum of its proper divisors (12450768).

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

7661856 is a wasteful number, since it uses less digits than its factorization.

7661856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79824 (or 79816 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 7661856 is about 2768.0057803408. The cubic root of 7661856 is about 197.1414720700.

The spelling of 7661856 in words is "seven million, six hundred sixty-one thousand, eight hundred fifty-six".