166618880 has 36 divisors (see below), whose sum is σ = 399107352. Its totient is φ = 66647040.

The previous prime is 166618871. The next prime is 166618889. The reversal of 166618880 is 88816661.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (166618871) and next prime (166618889).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166618889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63806 + ... + 66365.

Almost surely, 2^166618880 is an apocalyptic number.

166618880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166618880 is an abundant number, since it is smaller than the sum of its proper divisors (232488472).

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

166618880 is an equidigital number, since it uses as much as digits as its factorization.

166618880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130192 (or 130178 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 166618880 is about 12908.0935850342. The cubic root of 166618880 is about 550.2686070893.

The spelling of 166618880 in words is "one hundred sixty-six million, six hundred eighteen thousand, eight hundred eighty".