80663904 has 96 divisors (see below), whose sum is σ = 238140000. Its totient is φ = 26560512.

The previous prime is 80663903. The next prime is 80663909. The reversal of 80663904 is 40936608.

It is a tau number, because it is divible by the number of its divisors (96).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80663903) 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, 76372 + ... + 77420.

It is an arithmetic number, because the mean of its divisors is an integer number (2480625).

Almost surely, 2^80663904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80663904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119070000).

80663904 is an abundant number, since it is smaller than the sum of its proper divisors (157476096).

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

80663904 is a wasteful number, since it uses less digits than its factorization.

80663904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157 (or 1143 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 80663904 is about 8981.3085906231. The cubic root of 80663904 is about 432.0756040518.

The spelling of 80663904 in words is "eighty million, six hundred sixty-three thousand, nine hundred four".