166441726530 has 80 divisors (see below), whose sum is σ = 471098263680. Its totient is φ = 42048432288.

The previous prime is 166441726519. The next prime is 166441726531. The reversal of 166441726530 is 35627144661.

166441726530 is a `hidden beast` number, since 1 + 6 + 6 + 4 + 41 + 72 + 6 + 530 = 666.

166441726530 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (166441726531) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5392074 + ... + 5422853.

It is an arithmetic number, because the mean of its divisors is an integer number (5888728296).

Almost surely, 2^166441726530 is an apocalyptic number.

166441726530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166441726530 is an abundant number, since it is smaller than the sum of its proper divisors (304656537150).

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

166441726530 is a wasteful number, since it uses less digits than its factorization.

166441726530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10814965 (or 10814956 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 166441726530 in words is "one hundred sixty-six billion, four hundred forty-one million, seven hundred twenty-six thousand, five hundred thirty".