80655870 has 16 divisors (see below), whose sum is σ = 193574160. Its totient is φ = 21508224.

The previous prime is 80655863. The next prime is 80655889. The reversal of 80655870 is 7855608.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1344235 + ... + 1344294.

It is an arithmetic number, because the mean of its divisors is an integer number (12098385).

Almost surely, 2^80655870 is an apocalyptic number.

80655870 is an abundant number, since it is smaller than the sum of its proper divisors (112918290).

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

80655870 is a wasteful number, since it uses less digits than its factorization.

80655870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2688539.

The product of its (nonzero) digits is 67200, while the sum is 39.

The square root of 80655870 is about 8980.8613172680. The cubic root of 80655870 is about 432.0612588883.

The spelling of 80655870 in words is "eighty million, six hundred fifty-five thousand, eight hundred seventy".