79986663 has 32 divisors (see below), whose sum is σ = 124615680. Its totient is φ = 50608800.

The previous prime is 79986661. The next prime is 79986667. The reversal of 79986663 is 36668997.

It is a happy number.

It is not a de Polignac number, because 79986663 - 2¹ = 79986661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79986661) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 93345 + ... + 94197.

It is an arithmetic number, because the mean of its divisors is an integer number (3894240).

Almost surely, 2^79986663 is an apocalyptic number.

79986663 is a deficient number, since it is larger than the sum of its proper divisors (44629017).

79986663 is a wasteful number, since it uses less digits than its factorization.

79986663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036 (or 1030 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The square root of 79986663 is about 8943.5263179576. The cubic root of 79986663 is about 430.8629919294.

The spelling of 79986663 in words is "seventy-nine million, nine hundred eighty-six thousand, six hundred sixty-three".