79661006065051 has 4 divisors (see below), whose sum is σ = 79739644768992. Its totient is φ = 79582367361112.

The previous prime is 79661006065033. The next prime is 79661006065057. The reversal of 79661006065051 is 15056060016697.

It is a happy number.

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 79661006065051 - 2²¹ = 79661003967899 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 79661006065051.

It is not an unprimeable number, because it can be changed into a prime (79661006065057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39319350451 + ... + 39319352476.

It is an arithmetic number, because the mean of its divisors is an integer number (19934911192248).

Almost surely, 2^{79661006065051} is an apocalyptic number.

79661006065051 is a deficient number, since it is larger than the sum of its proper divisors (78638703941).

79661006065051 is a wasteful number, since it uses less digits than its factorization.

79661006065051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78638703940.

The product of its (nonzero) digits is 2041200, while the sum is 52.

The spelling of 79661006065051 in words is "seventy-nine trillion, six hundred sixty-one billion, six million, sixty-five thousand, fifty-one".