660801885 has 16 divisors (see below), whose sum is σ = 1059929280. Its totient is φ = 351545600.

The previous prime is 660801863. The next prime is 660801919. The reversal of 660801885 is 588108066.

660801885 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 660801885 - 2⁸ = 660801629 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48915 + ... + 60944.

It is an arithmetic number, because the mean of its divisors is an integer number (66245580).

Almost surely, 2^660801885 is an apocalyptic number.

It is an amenable number.

660801885 is a deficient number, since it is larger than the sum of its proper divisors (399127395).

660801885 is a wasteful number, since it uses less digits than its factorization.

660801885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110268.

The product of its (nonzero) digits is 92160, while the sum is 42.

The square root of 660801885 is about 25706.0670854178. The cubic root of 660801885 is about 871.0112366148.

The spelling of 660801885 in words is "six hundred sixty million, eight hundred one thousand, eight hundred eighty-five".