77966123872 has 48 divisors (see below), whose sum is σ = 188917922592. Its totient is φ = 30843740160.

The previous prime is 77966123831. The next prime is 77966123887. The reversal of 77966123872 is 27832166977.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13384129 + ... + 13389952.

It is an arithmetic number, because the mean of its divisors is an integer number (3935790054).

Almost surely, 2^77966123872 is an apocalyptic number.

It is an amenable number.

77966123872 is an abundant number, since it is smaller than the sum of its proper divisors (110951798720).

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

77966123872 is a wasteful number, since it uses less digits than its factorization.

77966123872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26774111 (or 26774103 counting only the distinct ones).

The product of its digits is 10668672, while the sum is 58.

The spelling of 77966123872 in words is "seventy-seven billion, nine hundred sixty-six million, one hundred twenty-three thousand, eight hundred seventy-two".