166660741187136 has 1512 divisors, whose sum is σ = 613966188981600. Its totient is φ = 44597647761408.

The previous prime is 166660741187113. The next prime is 166660741187183. The reversal of 166660741187136 is 631781147066661.

It is a tau number, because it is divible by the number of its divisors (1512).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 79400066215 + ... + 79400068313.

It is an arithmetic number, because the mean of its divisors is an integer number (406062294300).

Almost surely, 2^{166660741187136} is an apocalyptic number.

166660741187136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166660741187136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306983094490800).

166660741187136 is an abundant number, since it is smaller than the sum of its proper divisors (447305447794464).

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

166660741187136 is an equidigital number, since it uses as much as digits as its factorization.

166660741187136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2393 (or 2355 counting only the distinct ones).

The product of its (nonzero) digits is 36578304, while the sum is 63.

The spelling of 166660741187136 in words is "one hundred sixty-six trillion, six hundred sixty billion, seven hundred forty-one million, one hundred eighty-seven thousand, one hundred thirty-six".