166663008 has 72 divisors (see below), whose sum is σ = 491524488. Its totient is φ = 55551744.

The previous prime is 166662997. The next prime is 166663009. The reversal of 166663008 is 800366661.

166663008 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166663009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2941 + ... + 18492.

It is an arithmetic number, because the mean of its divisors is an integer number (6826729).

Almost surely, 2^166663008 is an apocalyptic number.

166663008 is a gapful number since it is divisible by the number (18) 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 166663008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245762244).

166663008 is an abundant number, since it is smaller than the sum of its proper divisors (324861480).

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

166663008 is an equidigital number, since it uses as much as digits as its factorization.

166663008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21458 (or 21438 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 166663008 is about 12909.8027870297. The cubic root of 166663008 is about 550.3171812359.

The spelling of 166663008 in words is "one hundred sixty-six million, six hundred sixty-three thousand, eight".