79866195780 has 48 divisors (see below), whose sum is σ = 255571827840. Its totient is φ = 18255130368.

The previous prime is 79866195769. The next prime is 79866195797. The reversal of 79866195780 is 8759166897.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95078385 + ... + 95079224.

It is an arithmetic number, because the mean of its divisors is an integer number (5324413080).

Almost surely, 2^79866195780 is an apocalyptic number.

79866195780 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

79866195780 is an abundant number, since it is smaller than the sum of its proper divisors (175705632060).

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

79866195780 is a wasteful number, since it uses less digits than its factorization.

79866195780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190157628 (or 190157626 counting only the distinct ones).

The product of its (nonzero) digits is 45722880, while the sum is 66.

The spelling of 79866195780 in words is "seventy-nine billion, eight hundred sixty-six million, one hundred ninety-five thousand, seven hundred eighty".