166420423142613 has 24 divisors (see below), whose sum is σ = 242304747296768. Its totient is φ = 110061131195232.

The previous prime is 166420423142579. The next prime is 166420423142627. The reversal of 166420423142613 is 316241324024661.

166420423142613 is a `hidden beast` number, since 1 + 6 + 6 + 4 + 2 + 0 + 4 + 23 + 1 + 4 + 2 + 613 = 666.

It is not a de Polignac number, because 166420423142613 - 2⁸ = 166420423142357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166420423149613) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2224656 + ... + 18379062.

Almost surely, 2^{166420423142613} is an apocalyptic number.

It is an amenable number.

166420423142613 is a deficient number, since it is larger than the sum of its proper divisors (75884324154155).

166420423142613 is a wasteful number, since it uses less digits than its factorization.

166420423142613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16163553 (or 16163550 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 45.

The spelling of 166420423142613 in words is "one hundred sixty-six trillion, four hundred twenty billion, four hundred twenty-three million, one hundred forty-two thousand, six hundred thirteen".