660150665565 has 32 divisors (see below), whose sum is σ = 1059464985600. Its totient is φ = 351006096384.

The previous prime is 660150665561. The next prime is 660150665609. The reversal of 660150665565 is 565566051066.

It is not a de Polignac number, because 660150665565 - 2² = 660150665561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660150665561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43374837 + ... + 43390053.

It is an arithmetic number, because the mean of its divisors is an integer number (33108280800).

Almost surely, 2^660150665565 is an apocalyptic number.

It is an amenable number.

660150665565 is a deficient number, since it is larger than the sum of its proper divisors (399314320035).

660150665565 is a wasteful number, since it uses less digits than its factorization.

660150665565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23861.

The product of its (nonzero) digits is 4860000, while the sum is 51.

The spelling of 660150665565 in words is "six hundred sixty billion, one hundred fifty million, six hundred sixty-five thousand, five hundred sixty-five".