66137407173 has 32 divisors (see below), whose sum is σ = 104380953600. Its totient is φ = 41267702448.

The previous prime is 66137407109. The next prime is 66137407181. The reversal of 66137407173 is 37170473166.

66137407173 is a `hidden beast` number, since 66 + 13 + 7 + 407 + 173 = 666.

It is not a de Polignac number, because 66137407173 - 2⁶ = 66137407109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66137407073) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 734065 + ... + 819222.

It is an arithmetic number, because the mean of its divisors is an integer number (3261904800).

Almost surely, 2^66137407173 is an apocalyptic number.

It is an amenable number.

66137407173 is a deficient number, since it is larger than the sum of its proper divisors (38243546427).

66137407173 is a wasteful number, since it uses less digits than its factorization.

66137407173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553398 (or 1553392 counting only the distinct ones).

The product of its (nonzero) digits is 444528, while the sum is 45.

The spelling of 66137407173 in words is "sixty-six billion, one hundred thirty-seven million, four hundred seven thousand, one hundred seventy-three".