80664390 has 32 divisors (see below), whose sum is σ = 215105760. Its totient is φ = 21510432.

The previous prime is 80664379. The next prime is 80664391. The reversal of 80664390 is 9346608.

80664390 is a `hidden beast` number, since 8 + 0 + 6 + 643 + 9 + 0 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80664391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149109 + ... + 149648.

It is an arithmetic number, because the mean of its divisors is an integer number (6722055).

Almost surely, 2^80664390 is an apocalyptic number.

80664390 is an abundant number, since it is smaller than the sum of its proper divisors (134441370).

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

80664390 is a wasteful number, since it uses less digits than its factorization.

80664390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298773 (or 298767 counting only the distinct ones).

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

The square root of 80664390 is about 8981.3356467733. The cubic root of 80664390 is about 432.0764718018.

The spelling of 80664390 in words is "eighty million, six hundred sixty-four thousand, three hundred ninety".