166556126202063 has 16 divisors (see below), whose sum is σ = 239158092364800. Its totient is φ = 102495830026464.

The previous prime is 166556126201989. The next prime is 166556126202083. The reversal of 166556126202063 is 360202621655661.

It is not a de Polignac number, because 166556126202063 - 2⁸ = 166556126201807 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166556126201997 and 166556126202015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166556126202083) 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, 11904238 + ... + 21790436.

It is an arithmetic number, because the mean of its divisors is an integer number (14947380772800).

Almost surely, 2^{166556126202063} is an apocalyptic number.

166556126202063 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

166556126202063 is a deficient number, since it is larger than the sum of its proper divisors (72601966162737).

166556126202063 is a wasteful number, since it uses less digits than its factorization.

166556126202063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10318198.

The product of its (nonzero) digits is 4665600, while the sum is 51.

The spelling of 166556126202063 in words is "one hundred sixty-six trillion, five hundred fifty-six billion, one hundred twenty-six million, two hundred two thousand, sixty-three".