80665938 has 12 divisors (see below), whose sum is σ = 174776238. Its totient is φ = 26888640.

The previous prime is 80665931. The next prime is 80665939. The reversal of 80665938 is 83956608.

It can be written as a sum of positive squares in only one way, i.e., 51796809 + 28869129 = 7197^2 + 5373^2 .

It is a junction number, because it is equal to n+sod(n) for n = 80665893 and 80665902.

It is not an unprimeable number, because it can be changed into a prime (80665931) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2240703 + ... + 2240738.

Almost surely, 2^80665938 is an apocalyptic number.

80665938 is an abundant number, since it is smaller than the sum of its proper divisors (94110300).

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

80665938 is a wasteful number, since it uses less digits than its factorization.

80665938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4481449 (or 4481446 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 80665938 is about 8981.4218250787. The cubic root of 80665938 is about 432.0792357232.

The spelling of 80665938 in words is "eighty million, six hundred sixty-five thousand, nine hundred thirty-eight".