2015667660 has 24 divisors (see below), whose sum is σ = 5643869616. Its totient is φ = 537511360.

The previous prime is 2015667659. The next prime is 2015667677. The reversal of 2015667660 is 667665102.

It is a super-2 number, since 2×2015667660² = 8125832231139751200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16797171 + ... + 16797290.

It is an arithmetic number, because the mean of its divisors is an integer number (235161234).

Almost surely, 2^2015667660 is an apocalyptic number.

2015667660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2015667660 is an abundant number, since it is smaller than the sum of its proper divisors (3628201956).

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

2015667660 is a wasteful number, since it uses less digits than its factorization.

2015667660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33594473 (or 33594471 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 2015667660 is about 44896.1875887029. The cubic root of 2015667660 is about 1263.2024984231.

The spelling of 2015667660 in words is "two billion, fifteen million, six hundred sixty-seven thousand, six hundred sixty".