79766905 has 4 divisors (see below), whose sum is σ = 95720292. Its totient is φ = 63813520.

The previous prime is 79766891. The next prime is 79766909. The reversal of 79766905 is 50966797.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24472809 + 55294096 = 4947^2 + 7436^2 .

It is not a de Polignac number, because 79766905 - 2⁷ = 79766777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79766909) 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, 7976686 + ... + 7976695.

It is an arithmetic number, because the mean of its divisors is an integer number (23930073).

Almost surely, 2^79766905 is an apocalyptic number.

It is an amenable number.

79766905 is a deficient number, since it is larger than the sum of its proper divisors (15953387).

79766905 is a wasteful number, since it uses less digits than its factorization.

79766905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15953386.

The product of its (nonzero) digits is 714420, while the sum is 49.

The square root of 79766905 is about 8931.2319978825. The cubic root of 79766905 is about 430.4680409358.

The spelling of 79766905 in words is "seventy-nine million, seven hundred sixty-six thousand, nine hundred five".