166501400563545 has 16 divisors (see below), whose sum is σ = 266535508704000. Its totient is φ = 88756324366464.

The previous prime is 166501400563501. The next prime is 166501400563559. The reversal of 166501400563545 is 545365004105661.

It is not a de Polignac number, because 166501400563545 - 2⁹ = 166501400563033 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2776381564 + ... + 2776441533.

It is an arithmetic number, because the mean of its divisors is an integer number (16658469294000).

Almost surely, 2^{166501400563545} is an apocalyptic number.

166501400563545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166501400563545 is a deficient number, since it is larger than the sum of its proper divisors (100034108140455).

166501400563545 is a wasteful number, since it uses less digits than its factorization.

166501400563545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5552825104.

The product of its (nonzero) digits is 6480000, while the sum is 51.

The spelling of 166501400563545 in words is "one hundred sixty-six trillion, five hundred one billion, four hundred million, five hundred sixty-three thousand, five hundred forty-five".