166513495041 has 40 divisors (see below), whose sum is σ = 264829789224. Its totient is φ = 103901667840.

The previous prime is 166513495009. The next prime is 166513495067. The reversal of 166513495041 is 140594315661.

166513495041 is a `hidden beast` number, since 1 + 6 + 6 + 5 + 134 + 9 + 504 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 531441 + 166512963600 = 729^2 + 408060^2 .

It is not a de Polignac number, because 166513495041 - 2⁵ = 166513495009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166513495441) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 84810 + ... + 583283.

Almost surely, 2^166513495041 is an apocalyptic number.

It is an amenable number.

166513495041 is a deficient number, since it is larger than the sum of its proper divisors (98316294183).

166513495041 is a wasteful number, since it uses less digits than its factorization.

166513495041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668303 (or 668294 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The spelling of 166513495041 in words is "one hundred sixty-six billion, five hundred thirteen million, four hundred ninety-five thousand, forty-one".