79866635000 has 40 divisors (see below), whose sum is σ = 187127537520. Its totient is φ = 31946652000.

The previous prime is 79866634999. The next prime is 79866635003. The reversal of 79866635000 is 53666897.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a self number, because there is not a number n which added to its sum of digits gives 79866635000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79866635003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 7981664 + ... + 7991663.

It is an arithmetic number, because the mean of its divisors is an integer number (4678188438).

Almost surely, 2^79866635000 is an apocalyptic number.

It is an amenable number.

79866635000 is an abundant number, since it is smaller than the sum of its proper divisors (107260902520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79866635000 is a wasteful number, since it uses less digits than its factorization.

79866635000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15973353 (or 15973334 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 50.

The spelling of 79866635000 in words is "seventy-nine billion, eight hundred sixty-six million, six hundred thirty-five thousand".