76740376721 has 2 divisors, whose sum is σ = 76740376722. Its totient is φ = 76740376720.

The previous prime is 76740376711. The next prime is 76740376763. The reversal of 76740376721 is 12767304767.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71562135121 + 5178241600 = 267511^2 + 71960^2 .

It is a cyclic number.

It is not a de Polignac number, because 76740376721 - 2²⁶ = 76673267857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 76740376721.

It is not a weakly prime, because it can be changed into another prime (76740376711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38370188360 + 38370188361.

It is an arithmetic number, because the mean of its divisors is an integer number (38370188361).

Almost surely, 2^76740376721 is an apocalyptic number.

It is an amenable number.

76740376721 is a deficient number, since it is larger than the sum of its proper divisors (1).

76740376721 is an equidigital number, since it uses as much as digits as its factorization.

76740376721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2074464, while the sum is 50.

The spelling of 76740376721 in words is "seventy-six billion, seven hundred forty million, three hundred seventy-six thousand, seven hundred twenty-one".