79748661 has 4 divisors (see below), whose sum is σ = 106331552. Its totient is φ = 53165772.

The previous prime is 79748611. The next prime is 79748663. The reversal of 79748661 is 16684797.

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: 16684797 = 3 ⋅5561599.

It is not a de Polignac number, because 79748661 - 2⁶ = 79748597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79748661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79748663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13291441 + ... + 13291446.

It is an arithmetic number, because the mean of its divisors is an integer number (26582888).

Almost surely, 2^79748661 is an apocalyptic number.

It is an amenable number.

79748661 is a deficient number, since it is larger than the sum of its proper divisors (26582891).

79748661 is a wasteful number, since it uses less digits than its factorization.

79748661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26582890.

The product of its digits is 508032, while the sum is 48.

The square root of 79748661 is about 8930.2105798240. The cubic root of 79748661 is about 430.4352200654.

The spelling of 79748661 in words is "seventy-nine million, seven hundred forty-eight thousand, six hundred sixty-one".