79981066 has 16 divisors (see below), whose sum is σ = 131018400. Its totient is φ = 36316080.

The previous prime is 79981021. The next prime is 79981079. The reversal of 79981066 is 66018997.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32905 + ... + 35251.

It is an arithmetic number, because the mean of its divisors is an integer number (8188650).

Almost surely, 2^79981066 is an apocalyptic number.

79981066 is a deficient number, since it is larger than the sum of its proper divisors (51037334).

79981066 is a wasteful number, since it uses less digits than its factorization.

79981066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3909.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 79981066 is about 8943.2134045879. The cubic root of 79981066 is about 430.8529419355.

The spelling of 79981066 in words is "seventy-nine million, nine hundred eighty-one thousand, sixty-six".