79662161 has 4 divisors (see below), whose sum is σ = 79847424. Its totient is φ = 79476900.

The previous prime is 79662137. The next prime is 79662169. The reversal of 79662161 is 16126697.

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: 16126697 = 29 ⋅556093.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79662161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79662169) 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, 91985 + ... + 92846.

It is an arithmetic number, because the mean of its divisors is an integer number (19961856).

Almost surely, 2^79662161 is an apocalyptic number.

It is an amenable number.

79662161 is a deficient number, since it is larger than the sum of its proper divisors (185263).

79662161 is a wasteful number, since it uses less digits than its factorization.

79662161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185262.

The product of its digits is 27216, while the sum is 38.

The square root of 79662161 is about 8925.3661549541. The cubic root of 79662161 is about 430.2795388048.

The spelling of 79662161 in words is "seventy-nine million, six hundred sixty-two thousand, one hundred sixty-one".