80866920 has 32 divisors (see below), whose sum is σ = 242601120. Its totient is φ = 21564480.

The previous prime is 80866901. The next prime is 80866927. The reversal of 80866920 is 2966808.

It is not an unprimeable number, because it can be changed into a prime (80866927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336826 + ... + 337065.

It is an arithmetic number, because the mean of its divisors is an integer number (7581285).

Almost surely, 2^80866920 is an apocalyptic number.

It is an amenable number.

80866920 is an abundant number, since it is smaller than the sum of its proper divisors (161734200).

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

80866920 is a wasteful number, since it uses less digits than its factorization.

80866920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673905 (or 673901 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 80866920 is about 8992.6036274263. The cubic root of 80866920 is about 432.4377849408.

The spelling of 80866920 in words is "eighty million, eight hundred sixty-six thousand, nine hundred twenty".