660115665610 has 8 divisors (see below), whose sum is σ = 1188208198116. Its totient is φ = 264046266240.

The previous prime is 660115665577. The next prime is 660115665613. The reversal of 660115665610 is 16566511066.

It can be written as a sum of positive squares in 2 ways, for example, as 635223346081 + 24892319529 = 797009^2 + 157773^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (660115665613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33005783271 + ... + 33005783290.

Almost surely, 2^660115665610 is an apocalyptic number.

660115665610 is a deficient number, since it is larger than the sum of its proper divisors (528092532506).

660115665610 is a wasteful number, since it uses less digits than its factorization.

660115665610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66011566568.

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 660115665610 in words is "six hundred sixty billion, one hundred fifteen million, six hundred sixty-five thousand, six hundred ten".