76977966 has 32 divisors (see below), whose sum is σ = 166699008. Its totient is φ = 23556960.

The previous prime is 76977961. The next prime is 76978007. The reversal of 76977966 is 66977967.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76977961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12315 + ... + 17481.

It is an arithmetic number, because the mean of its divisors is an integer number (5209344).

Almost surely, 2^76977966 is an apocalyptic number.

76977966 is an abundant number, since it is smaller than the sum of its proper divisors (89721042).

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

76977966 is a wasteful number, since it uses less digits than its factorization.

76977966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5376.

The product of its digits is 6001128, while the sum is 57.

The square root of 76977966 is about 8773.7087938910. The cubic root of 76977966 is about 425.3915026809.

Subtracting from 76977966 its reverse (66977967), we obtain a palindrome (9999999).

The spelling of 76977966 in words is "seventy-six million, nine hundred seventy-seven thousand, nine hundred sixty-six".