80664402 has 64 divisors (see below), whose sum is σ = 200035584. Its totient is φ = 21116160.

The previous prime is 80664391. The next prime is 80664407. The reversal of 80664402 is 20446608.

It is a self number, because there is not a number n which added to its sum of digits gives 80664402.

It is not an unprimeable number, because it can be changed into a prime (80664407) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85252 + ... + 86192.

It is an arithmetic number, because the mean of its divisors is an integer number (3125556).

Almost surely, 2^80664402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80664402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100017792).

80664402 is an abundant number, since it is smaller than the sum of its proper divisors (119371182).

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

80664402 is a wasteful number, since it uses less digits than its factorization.

80664402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123.

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 80664402 is about 8981.3363148253. The cubic root of 80664402 is about 432.0764932277.

The spelling of 80664402 in words is "eighty million, six hundred sixty-four thousand, four hundred two".