79770761 has 4 divisors (see below), whose sum is σ = 91166592. Its totient is φ = 68374932.

The previous prime is 79770689. The next prime is 79770767. The reversal of 79770761 is 16707797.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16707797 = 59 ⋅283183.

It is a cyclic number.

It is not a de Polignac number, because 79770761 - 2¹⁸ = 79508617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (79770767) 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, 5697905 + ... + 5697918.

It is an arithmetic number, because the mean of its divisors is an integer number (22791648).

Almost surely, 2^79770761 is an apocalyptic number.

It is an amenable number.

79770761 is a deficient number, since it is larger than the sum of its proper divisors (11395831).

79770761 is a wasteful number, since it uses less digits than its factorization.

79770761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11395830.

The product of its (nonzero) digits is 129654, while the sum is 44.

The square root of 79770761 is about 8931.4478669474. The cubic root of 79770761 is about 430.4749772210.

The spelling of 79770761 in words is "seventy-nine million, seven hundred seventy thousand, seven hundred sixty-one".