80700865 has 16 divisors (see below), whose sum is σ = 112492800. Its totient is φ = 54429120.

The previous prime is 80700863. The next prime is 80700877. The reversal of 80700865 is 56800708.

It is not a de Polignac number, because 80700865 - 2¹ = 80700863 is a prime.

It is a super-2 number, since 2×80700865² = 13025259223496450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 80700865.

It is not an unprimeable number, because it can be changed into a prime (80700863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16765 + ... + 21034.

It is an arithmetic number, because the mean of its divisors is an integer number (7030800).

Almost surely, 2^80700865 is an apocalyptic number.

It is an amenable number.

80700865 is a deficient number, since it is larger than the sum of its proper divisors (31791935).

80700865 is a wasteful number, since it uses less digits than its factorization.

80700865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37872.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 80700865 is about 8983.3660172566. The cubic root of 80700865 is about 432.1415877489.

The spelling of 80700865 in words is "eighty million, seven hundred thousand, eight hundred sixty-five".