77866612528 has 20 divisors (see below), whose sum is σ = 152250662080. Its totient is φ = 38576119104.

The previous prime is 77866612471. The next prime is 77866612529. The reversal of 77866612528 is 82521666877.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (77866612529) 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, 22322400 + ... + 22325887.

It is an arithmetic number, because the mean of its divisors is an integer number (7612533104).

Almost surely, 2^77866612528 is an apocalyptic number.

It is an amenable number.

77866612528 is a deficient number, since it is larger than the sum of its proper divisors (74384049552).

77866612528 is a wasteful number, since it uses less digits than its factorization.

77866612528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44648404 (or 44648398 counting only the distinct ones).

The product of its digits is 13547520, while the sum is 58.

The spelling of 77866612528 in words is "seventy-seven billion, eight hundred sixty-six million, six hundred twelve thousand, five hundred twenty-eight".