166443304500 has 432 divisors, whose sum is σ = 580014489600. Its totient is φ = 40149648000.

The previous prime is 166443304457. The next prime is 166443304501. The reversal of 166443304500 is 5403344661.

166443304500 is a `hidden beast` number, since 1 + 6 + 644 + 3 + 3 + 0 + 4 + 5 + 0 + 0 = 666.

166443304500 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×166443304500² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166443304501) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 130134861 + ... + 130136139.

Almost surely, 2^166443304500 is an apocalyptic number.

166443304500 is a gapful number since it is divisible by the number (10) 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 166443304500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290007244800).

166443304500 is an abundant number, since it is smaller than the sum of its proper divisors (413571185100).

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

166443304500 is a wasteful number, since it uses less digits than its factorization.

166443304500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565 (or 1539 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The spelling of 166443304500 in words is "one hundred sixty-six billion, four hundred forty-three million, three hundred four thousand, five hundred".