79669751 has 4 divisors (see below), whose sum is σ = 91051152. Its totient is φ = 68288352.

The previous prime is 79669741. The next prime is 79669753. The reversal of 79669751 is 15796697.

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 79669751 - 2²² = 75475447 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 79669751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79669753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5690690 + ... + 5690703.

It is an arithmetic number, because the mean of its divisors is an integer number (22762788).

Almost surely, 2^79669751 is an apocalyptic number.

79669751 is a deficient number, since it is larger than the sum of its proper divisors (11381401).

79669751 is a wasteful number, since it uses less digits than its factorization.

79669751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11381400.

The product of its digits is 714420, while the sum is 50.

The square root of 79669751 is about 8925.7913374669. The cubic root of 79669751 is about 430.2932036697.

The spelling of 79669751 in words is "seventy-nine million, six hundred sixty-nine thousand, seven hundred fifty-one".