77066372317 has 4 divisors (see below), whose sum is σ = 84072406176. Its totient is φ = 70060338460.

The previous prime is 77066372263. The next prime is 77066372329. The reversal of 77066372317 is 71327366077.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 77066372317 - 2²⁷ = 76932154589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77066372387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3503016913 + ... + 3503016934.

It is an arithmetic number, because the mean of its divisors is an integer number (21018101544).

Almost surely, 2^77066372317 is an apocalyptic number.

It is an amenable number.

77066372317 is a deficient number, since it is larger than the sum of its proper divisors (7006033859).

77066372317 is a wasteful number, since it uses less digits than its factorization.

77066372317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7006033858.

The product of its (nonzero) digits is 1555848, while the sum is 49.

The spelling of 77066372317 in words is "seventy-seven billion, sixty-six million, three hundred seventy-two thousand, three hundred seventeen".