79271661 has 24 divisors (see below), whose sum is σ = 125821344. Its totient is φ = 44241120.

The previous prime is 79271659. The next prime is 79271669. The reversal of 79271661 is 16617297.

It is not a de Polignac number, because 79271661 - 2¹ = 79271659 is a prime.

It is a super-3 number, since 3×79271661³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79271669) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51 + ... + 12591.

It is an arithmetic number, because the mean of its divisors is an integer number (5242556).

Almost surely, 2^79271661 is an apocalyptic number.

It is an amenable number.

79271661 is a deficient number, since it is larger than the sum of its proper divisors (46549683).

79271661 is a wasteful number, since it uses less digits than its factorization.

79271661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12601 (or 12594 counting only the distinct ones).

The product of its digits is 31752, while the sum is 39.

The square root of 79271661 is about 8903.4634272288. The cubic root of 79271661 is about 429.5753171407.

The spelling of 79271661 in words is "seventy-nine million, two hundred seventy-one thousand, six hundred sixty-one".