80920660 has 12 divisors (see below), whose sum is σ = 169933428. Its totient is φ = 32368256.

The previous prime is 80920649. The next prime is 80920673. The reversal of 80920660 is 6602908.

It can be written as a sum of positive squares in 2 ways, for example, as 55175184 + 25745476 = 7428^2 + 5074^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2022997 + ... + 2023036.

It is an arithmetic number, because the mean of its divisors is an integer number (14161119).

Almost surely, 2^80920660 is an apocalyptic number.

It is an amenable number.

80920660 is an abundant number, since it is smaller than the sum of its proper divisors (89012768).

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

80920660 is a wasteful number, since it uses less digits than its factorization.

80920660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4046042 (or 4046040 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 80920660 is about 8995.5911423319. The cubic root of 80920660 is about 432.5335557067.

The spelling of 80920660 in words is "eighty million, nine hundred twenty thousand, six hundred sixty".