166331134147644 has 18 divisors (see below), whose sum is σ = 420448144651080. Its totient is φ = 55443711382536.

The previous prime is 166331134147609. The next prime is 166331134147649. The reversal of 166331134147644 is 446741431133661.

166331134147644 is a `hidden beast` number, since 1 + 6 + 6 + 3 + 3 + 113 + 414 + 76 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166331134147649) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2310154640904 + ... + 2310154640975.

Almost surely, 2^{166331134147644} is an apocalyptic number.

It is an amenable number.

166331134147644 is an abundant number, since it is smaller than the sum of its proper divisors (254117010503436).

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

166331134147644 is a wasteful number, since it uses less digits than its factorization.

166331134147644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4620309281889 (or 4620309281884 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 54.

The spelling of 166331134147644 in words is "one hundred sixty-six trillion, three hundred thirty-one billion, one hundred thirty-four million, one hundred forty-seven thousand, six hundred forty-four".