80966138 has 32 divisors (see below), whose sum is σ = 144099648. Its totient is φ = 33696000.

The previous prime is 80966111. The next prime is 80966143. The reversal of 80966138 is 83166908.

It is a happy number.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 80966095 and 80966104.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10913 + ... + 16763.

It is an arithmetic number, because the mean of its divisors is an integer number (4503114).

Almost surely, 2^80966138 is an apocalyptic number.

80966138 is a deficient number, since it is larger than the sum of its proper divisors (63133510).

80966138 is a wasteful number, since it uses less digits than its factorization.

80966138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5918.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 80966138 is about 8998.1185811257. The cubic root of 80966138 is about 432.6145695342.

The spelling of 80966138 in words is "eighty million, nine hundred sixty-six thousand, one hundred thirty-eight".