77881986966 has 16 divisors (see below), whose sum is σ = 178015970304. Its totient is φ = 22251996264.

The previous prime is 77881986947. The next prime is 77881986983. The reversal of 77881986966 is 66968918877.

It is a Curzon number.

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, 927166470 + ... + 927166553.

It is an arithmetic number, because the mean of its divisors is an integer number (11125998144).

Almost surely, 2^77881986966 is an apocalyptic number.

77881986966 is an abundant number, since it is smaller than the sum of its proper divisors (100133983338).

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

77881986966 is a wasteful number, since it uses less digits than its factorization.

77881986966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1854333035.

The product of its digits is 438939648, while the sum is 75.

The spelling of 77881986966 in words is "seventy-seven billion, eight hundred eighty-one million, nine hundred eighty-six thousand, nine hundred sixty-six".