76566982961 has 6 divisors (see below), whose sum is σ = 89067714930. Its totient is φ = 65628842496.

The previous prime is 76566982913. The next prime is 76566982963. The reversal of 76566982961 is 16928966567.

It can be written as a sum of positive squares in only one way, i.e., 46166968225 + 30400014736 = 214865^2 + 174356^2 .

It is not a de Polignac number, because 76566982961 - 2⁶ = 76566982897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76566982963) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 781295696 + ... + 781295793.

It is an arithmetic number, because the mean of its divisors is an integer number (14844619155).

Almost surely, 2^76566982961 is an apocalyptic number.

It is an amenable number.

76566982961 is a deficient number, since it is larger than the sum of its proper divisors (12500731969).

76566982961 is a wasteful number, since it uses less digits than its factorization.

76566982961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1562591503 (or 1562591496 counting only the distinct ones).

The product of its digits is 58786560, while the sum is 65.

The spelling of 76566982961 in words is "seventy-six billion, five hundred sixty-six million, nine hundred eighty-two thousand, nine hundred sixty-one".