79866844 has 6 divisors (see below), whose sum is σ = 139766984. Its totient is φ = 39933420.

The previous prime is 79866827. The next prime is 79866851. The reversal of 79866844 is 44866897.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 79866791 and 79866800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9983352 + ... + 9983359.

Almost surely, 2^79866844 is an apocalyptic number.

It is an amenable number.

79866844 is a deficient number, since it is larger than the sum of its proper divisors (59900140).

79866844 is a wasteful number, since it uses less digits than its factorization.

79866844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19966715 (or 19966713 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 52.

The square root of 79866844 is about 8936.8251633340. The cubic root of 79866844 is about 430.6477419927.

The spelling of 79866844 in words is "seventy-nine million, eight hundred sixty-six thousand, eight hundred forty-four".