66124242166 has 4 divisors (see below), whose sum is σ = 99186363252. Its totient is φ = 33062121082.

The previous prime is 66124242161. The next prime is 66124242179.

It is a happy number.

66124242166 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66124242161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16531060540 + ... + 16531060543.

It is an arithmetic number, because the mean of its divisors is an integer number (24796590813).

Almost surely, 2^66124242166 is an apocalyptic number.

66124242166 is a deficient number, since it is larger than the sum of its proper divisors (33062121086).

66124242166 is a wasteful number, since it uses less digits than its factorization.

66124242166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33062121085.

The product of its digits is 165888, while the sum is 40.

The spelling of 66124242166 in words is "sixty-six billion, one hundred twenty-four million, two hundred forty-two thousand, one hundred sixty-six".