76961556 has 72 divisors (see below), whose sum is σ = 232122240. Its totient is φ = 21987504.

The previous prime is 76961543. The next prime is 76961579. The reversal of 76961556 is 65516967.

76961556 is a `hidden beast` number, since 7 + 6 + 96 + 1 + 556 = 666.

It is a super-2 number, since 2×76961556² = 11846162203882272, 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 in 23 ways as a sum of consecutive naturals, for example, 1980 + ... + 12563.

It is an arithmetic number, because the mean of its divisors is an integer number (3223920).

Almost surely, 2^76961556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 76961556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116061120).

76961556 is an abundant number, since it is smaller than the sum of its proper divisors (155160684).

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

76961556 is a wasteful number, since it uses less digits than its factorization.

76961556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14570 (or 14555 counting only the distinct ones).

The product of its digits is 340200, while the sum is 45.

The square root of 76961556 is about 8772.7735637026. The cubic root of 76961556 is about 425.3612725123.

The spelling of 76961556 in words is "seventy-six million, nine hundred sixty-one thousand, five hundred fifty-six".