166668560 has 20 divisors (see below), whose sum is σ = 387504588. Its totient is φ = 66667392.

The previous prime is 166668553. The next prime is 166668571. The reversal of 166668560 is 65866661.

It can be written as a sum of positive squares in 2 ways, for example, as 39790864 + 126877696 = 6308^2 + 11264^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

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, 1041599 + ... + 1041758.

Almost surely, 2^166668560 is an apocalyptic number.

166668560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166668560 is an abundant number, since it is smaller than the sum of its proper divisors (220836028).

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

166668560 is a wasteful number, since it uses less digits than its factorization.

166668560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2083370 (or 2083364 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 166668560 is about 12910.0178156345. The cubic root of 166668560 is about 550.3232920242.

The spelling of 166668560 in words is "one hundred sixty-six million, six hundred sixty-eight thousand, five hundred sixty".