660083904 has 70 divisors (see below), whose sum is σ = 1956710844. Its totient is φ = 220026240.

The previous prime is 660083903. The next prime is 660083909. The reversal of 660083904 is 409380066.

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

It is not an unprimeable number, because it can be changed into a prime (660083903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 58482 + ... + 68849.

Almost surely, 2^660083904 is an apocalyptic number.

660083904 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

660083904 is an abundant number, since it is smaller than the sum of its proper divisors (1296626940).

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

660083904 is a wasteful number, since it uses less digits than its factorization.

660083904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127355 (or 127336 counting only the distinct ones).

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

The square root of 660083904 is about 25692.0980848198. The cubic root of 660083904 is about 870.6956623790.

The spelling of 660083904 in words is "six hundred sixty million, eighty-three thousand, nine hundred four".