77006656 has 14 divisors (see below), whose sum is σ = 152810210. Its totient is φ = 38503296.

The previous prime is 77006641. The next prime is 77006669. The reversal of 77006656 is 65660077.

It can be written as a sum of positive squares in only one way, i.e., 76038400 + 968256 = 8720^2 + 984^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601551 + ... + 601678.

It is an arithmetic number, because the mean of its divisors is an integer number (10915015).

Almost surely, 2^77006656 is an apocalyptic number.

It is an amenable number.

77006656 is a deficient number, since it is larger than the sum of its proper divisors (75803554).

77006656 is a wasteful number, since it uses less digits than its factorization.

77006656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203241 (or 1203231 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 77006656 is about 8775.3436399950. The cubic root of 77006656 is about 425.4443444958. Note that the first 3 decimals are identical.

The spelling of 77006656 in words is "seventy-seven million, six thousand, six hundred fifty-six".