666015160660 has 24 divisors (see below), whose sum is σ = 1398682222056. Its totient is φ = 266396467200.

The previous prime is 666015160637. The next prime is 666015160661. The reversal of 666015160660 is 66061510666.

It can be written as a sum of positive squares in 4 ways, for example, as 3318220816 + 662696939844 = 57604^2 + 814062^2 .

It is a super-2 number, since 2×666015160660² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666015160661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16941 + ... + 1154260.

It is an arithmetic number, because the mean of its divisors is an integer number (58278425919).

Almost surely, 2^666015160660 is an apocalyptic number.

It is an amenable number.

666015160660 is an abundant number, since it is smaller than the sum of its proper divisors (732667061396).

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

666015160660 is a wasteful number, since it uses less digits than its factorization.

666015160660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199643 (or 1199641 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 43.

The spelling of 666015160660 in words is "six hundred sixty-six billion, fifteen million, one hundred sixty thousand, six hundred sixty".