166718880 has 72 divisors (see below), whose sum is σ = 568933092. Its totient is φ = 44457984.

The previous prime is 166718873. The next prime is 166718887. The reversal of 166718880 is 88817661.

166718880 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (166718873) and next prime (166718887).

It can be written as a sum of positive squares in 2 ways, for example, as 151880976 + 14837904 = 12324^2 + 3852^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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

It is not an unprimeable number, because it can be changed into a prime (166718887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56449 + ... + 59328.

Almost surely, 2^166718880 is an apocalyptic number.

166718880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166718880 is an abundant number, since it is smaller than the sum of its proper divisors (402214212).

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

166718880 is a wasteful number, since it uses less digits than its factorization.

166718880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115798 (or 115787 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The square root of 166718880 is about 12911.9665427076. The cubic root of 166718880 is about 550.3786703583.

The spelling of 166718880 in words is "one hundred sixty-six million, seven hundred eighteen thousand, eight hundred eighty".