77000765 has 8 divisors (see below), whose sum is σ = 93667128. Its totient is φ = 60756480.

The previous prime is 77000719. The next prime is 77000779. The reversal of 77000765 is 56700077.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 26604964 + 50395801 = 5158^2 + 7099^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77000765 - 2⁸ = 77000509 is a prime.

It is a Duffinian 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, 105116 + ... + 105845.

It is an arithmetic number, because the mean of its divisors is an integer number (11708391).

Almost surely, 2^77000765 is an apocalyptic number.

It is an amenable number.

77000765 is a deficient number, since it is larger than the sum of its proper divisors (16666363).

77000765 is a wasteful number, since it uses less digits than its factorization.

77000765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211039.

The product of its (nonzero) digits is 10290, while the sum is 32.

The square root of 77000765 is about 8775.0079772044. The cubic root of 77000765 is about 425.4334954053.

The spelling of 77000765 in words is "seventy-seven million, seven hundred sixty-five", and thus it is an aban number.