166568408486513 has 16 divisors (see below), whose sum is σ = 185940751392000. Its totient is φ = 147901174244880.

The previous prime is 166568408486503. The next prime is 166568408486537. The reversal of 166568408486513 is 315684804865661.

It is a cyclic number.

It is not a de Polignac number, because 166568408486513 - 2⁴ = 166568408486497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166568408486503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18870218 + ... + 26253036.

It is an arithmetic number, because the mean of its divisors is an integer number (11621296962000).

Almost surely, 2^{166568408486513} is an apocalyptic number.

It is an amenable number.

166568408486513 is a deficient number, since it is larger than the sum of its proper divisors (19372342905487).

166568408486513 is a wasteful number, since it uses less digits than its factorization.

166568408486513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7430572.

The product of its (nonzero) digits is 796262400, while the sum is 71.

The spelling of 166568408486513 in words is "one hundred sixty-six trillion, five hundred sixty-eight billion, four hundred eight million, four hundred eighty-six thousand, five hundred thirteen".