660801015 has 36 divisors (see below), whose sum is σ = 1332395064. Its totient is φ = 302079456.

The previous prime is 660800993. The next prime is 660801023. The reversal of 660801015 is 510108066.

It is not a de Polignac number, because 660801015 - 2⁷ = 660800887 is a prime.

It is a super-3 number, since 3×660801015³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 660801015.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 147637 + ... + 152046.

It is an arithmetic number, because the mean of its divisors is an integer number (37010974).

Almost surely, 2^660801015 is an apocalyptic number.

660801015 is an abundant number, since it is smaller than the sum of its proper divisors (671594049).

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

660801015 is a wasteful number, since it uses less digits than its factorization.

660801015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299708 (or 299698 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 660801015 is about 25706.0501633370. The cubic root of 660801015 is about 871.0108543620.

The spelling of 660801015 in words is "six hundred sixty million, eight hundred one thousand, fifteen".