80661328 has 40 divisors (see below), whose sum is σ = 180524160. Its totient is φ = 34506240.

The previous prime is 80661307. The next prime is 80661341. The reversal of 80661328 is 82316608.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 80661293 and 80661302.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 10488 + ... + 16471.

It is an arithmetic number, because the mean of its divisors is an integer number (4513104).

Almost surely, 2^80661328 is an apocalyptic number.

80661328 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

80661328 is an abundant number, since it is smaller than the sum of its proper divisors (99862832).

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

80661328 is a wasteful number, since it uses less digits than its factorization.

80661328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26995 (or 26989 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 80661328 is about 8981.1651805320. The cubic root of 80661328 is about 432.0710045612.

The spelling of 80661328 in words is "eighty million, six hundred sixty-one thousand, three hundred twenty-eight".