77809065 has 8 divisors (see below), whose sum is σ = 124494528. Its totient is φ = 41498160.

The previous prime is 77809033. The next prime is 77809073. The reversal of 77809065 is 56090877.

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

It is not a de Polignac number, because 77809065 - 2⁵ = 77809033 is a prime.

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, 2593621 + ... + 2593650.

It is an arithmetic number, because the mean of its divisors is an integer number (15561816).

Almost surely, 2^77809065 is an apocalyptic number.

It is an amenable number.

77809065 is a deficient number, since it is larger than the sum of its proper divisors (46685463).

77809065 is a wasteful number, since it uses less digits than its factorization.

77809065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5187279.

The product of its (nonzero) digits is 105840, while the sum is 42.

The square root of 77809065 is about 8820.9446773007. The cubic root of 77809065 is about 426.9169507964.

The spelling of 77809065 in words is "seventy-seven million, eight hundred nine thousand, sixty-five".