77625866466 has 24 divisors (see below), whose sum is σ = 169060832460. Its totient is φ = 25741218816.

The previous prime is 77625866453. The next prime is 77625866477. The reversal of 77625866466 is 66466852677.

77625866466 is a `hidden beast` number, since 7 + 7 + 6 + 2 + 586 + 6 + 46 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 76602186441 + 1023680025 = 276771^2 + 31995^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11168931 + ... + 11175878.

Almost surely, 2^77625866466 is an apocalyptic number.

77625866466 is an abundant number, since it is smaller than the sum of its proper divisors (91434965994).

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

77625866466 is a wasteful number, since it uses less digits than its factorization.

77625866466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22345010 (or 22345007 counting only the distinct ones).

The product of its digits is 121927680, while the sum is 63.

It can be divided in two parts, 776258 and 66466, that added together give a square (842724 = 918²).

The spelling of 77625866466 in words is "seventy-seven billion, six hundred twenty-five million, eight hundred sixty-six thousand, four hundred sixty-six".