80031665 has 16 divisors (see below), whose sum is σ = 116214912. Its totient is φ = 51650304.

The previous prime is 80031659. The next prime is 80031683. The reversal of 80031665 is 56613008.

It is a cyclic number.

It is not a de Polignac number, because 80031665 - 2⁴ = 80031649 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66659 + ... + 67848.

It is an arithmetic number, because the mean of its divisors is an integer number (7263432).

Almost surely, 2^80031665 is an apocalyptic number.

80031665 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

80031665 is a deficient number, since it is larger than the sum of its proper divisors (36183247).

80031665 is a wasteful number, since it uses less digits than its factorization.

80031665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134536.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 80031665 is about 8946.0418621869. The cubic root of 80031665 is about 430.9437806527.

The spelling of 80031665 in words is "eighty million, thirty-one thousand, six hundred sixty-five".