166641575737065 has 48 divisors (see below), whose sum is σ = 315612576291264. Its totient is φ = 74580845074560.

The previous prime is 166641575737037. The next prime is 166641575737069. The reversal of 166641575737065 is 560737575146661.

It is not a de Polignac number, because 166641575737065 - 2¹⁵ = 166641575704297 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (166641575737069) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3531266419 + ... + 3531313608.

It is an arithmetic number, because the mean of its divisors is an integer number (6575262006068).

Almost surely, 2^{166641575737065} is an apocalyptic number.

166641575737065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166641575737065 is a deficient number, since it is larger than the sum of its proper divisors (148971000554199).

166641575737065 is a wasteful number, since it uses less digits than its factorization.

166641575737065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7062580070 (or 7062580059 counting only the distinct ones).

The product of its (nonzero) digits is 666792000, while the sum is 69.

The spelling of 166641575737065 in words is "one hundred sixty-six trillion, six hundred forty-one billion, five hundred seventy-five million, seven hundred thirty-seven thousand, sixty-five".