80668685 has 16 divisors (see below), whose sum is σ = 99360000. Its totient is φ = 62844096.

The previous prime is 80668681. The next prime is 80668697. The reversal of 80668685 is 58686608.

It is a cyclic number.

It is not a de Polignac number, because 80668685 - 2² = 80668681 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80668681) by changing a digit.

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, 53066 + ... + 54564.

It is an arithmetic number, because the mean of its divisors is an integer number (6210000).

Almost surely, 2^80668685 is an apocalyptic number.

It is an amenable number.

80668685 is a deficient number, since it is larger than the sum of its proper divisors (18691315).

80668685 is a wasteful number, since it uses less digits than its factorization.

80668685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780.

The product of its (nonzero) digits is 552960, while the sum is 47.

The square root of 80668685 is about 8981.5747505657. The cubic root of 80668685 is about 432.0841403468.

The spelling of 80668685 in words is "eighty million, six hundred sixty-eight thousand, six hundred eighty-five".