66137873166 has 32 divisors (see below), whose sum is σ = 146981604000. Its totient is φ = 22044674880.

The previous prime is 66137873161. The next prime is 66137873173.

It is a happy number.

66137873166 is a `hidden beast` number, since 6 + 613 + 7 + 8 + 7 + 3 + 16 + 6 = 666.

66137873166 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66137873161) 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, 1540560 + ... + 1582908.

It is an arithmetic number, because the mean of its divisors is an integer number (4593175125).

Almost surely, 2^66137873166 is an apocalyptic number.

66137873166 is an abundant number, since it is smaller than the sum of its proper divisors (80843730834).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66137873166 is a wasteful number, since it uses less digits than its factorization.

66137873166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71281 (or 71275 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 54.

The spelling of 66137873166 in words is "sixty-six billion, one hundred thirty-seven million, eight hundred seventy-three thousand, one hundred sixty-six".