66144244166 has 96 divisors (see below), whose sum is σ = 136964251200. Its totient is φ = 23787751680.

The previous prime is 66144244151. The next prime is 66144244193.

66144244166 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×66144244166² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1048430 + ... + 1109726.

It is an arithmetic number, because the mean of its divisors is an integer number (1426710950).

Almost surely, 2^66144244166 is an apocalyptic number.

66144244166 is an abundant number, since it is smaller than the sum of its proper divisors (70820007034).

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

66144244166 is a wasteful number, since it uses less digits than its factorization.

66144244166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61355 (or 61330 counting only the distinct ones).

The product of its digits is 663552, while the sum is 44.

The spelling of 66144244166 in words is "sixty-six billion, one hundred forty-four million, two hundred forty-four thousand, one hundred sixty-six".