80634665 has 16 divisors (see below), whose sum is σ = 101927808. Its totient is φ = 61117056.

The previous prime is 80634647. The next prime is 80634707. The reversal of 80634665 is 56643608.

It is a cyclic number.

It is not a de Polignac number, because 80634665 - 2⁸ = 80634409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9029 + ... + 15581.

It is an arithmetic number, because the mean of its divisors is an integer number (6370488).

Almost surely, 2^80634665 is an apocalyptic number.

It is an amenable number.

80634665 is a deficient number, since it is larger than the sum of its proper divisors (21293143).

80634665 is a wasteful number, since it uses less digits than its factorization.

80634665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6688.

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 80634665 is about 8979.6806736097. The cubic root of 80634665 is about 432.0233915803.

The spelling of 80634665 in words is "eighty million, six hundred thirty-four thousand, six hundred sixty-five".