79662811 has 4 divisors (see below), whose sum is σ = 79804872. Its totient is φ = 79520752.

The previous prime is 79662773. The next prime is 79662857. The reversal of 79662811 is 11826697.

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

It is a cyclic number.

It is not a de Polignac number, because 79662811 - 2⁹ = 79662299 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79662881) 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, 70186 + ... + 71311.

It is an arithmetic number, because the mean of its divisors is an integer number (19951218).

Almost surely, 2^79662811 is an apocalyptic number.

79662811 is a deficient number, since it is larger than the sum of its proper divisors (142061).

79662811 is a wasteful number, since it uses less digits than its factorization.

79662811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142060.

The product of its digits is 36288, while the sum is 40.

The square root of 79662811 is about 8925.4025679518. The cubic root of 79662811 is about 430.2807090842.

The spelling of 79662811 in words is "seventy-nine million, six hundred sixty-two thousand, eight hundred eleven".