77975629566 has 8 divisors (see below), whose sum is σ = 155951259144. Its totient is φ = 25991876520.

The previous prime is 77975629561. The next prime is 77975629607. The reversal of 77975629566 is 66592657977.

It is a sphenic number, since it is the product of 3 distinct primes.

77975629566 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 77975629566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77975629561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6497969125 + ... + 6497969136.

It is an arithmetic number, because the mean of its divisors is an integer number (19493907393).

Almost surely, 2^77975629566 is an apocalyptic number.

77975629566 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

77975629566 is a wasteful number, since it uses less digits than its factorization.

77975629566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12995938266.

The product of its digits is 300056400, while the sum is 69.

The spelling of 77975629566 in words is "seventy-seven billion, nine hundred seventy-five million, six hundred twenty-nine thousand, five hundred sixty-six".