166668585 has 16 divisors (see below), whose sum is σ = 266838720. Its totient is φ = 88833600.

The previous prime is 166668581. The next prime is 166668587. The reversal of 166668585 is 585866661.

It is not a de Polignac number, because 166668585 - 2² = 166668581 is a prime.

It is a super-6 number, since 6×166668585⁶ (a number of 51 digits) contains 666666 as substring.

It is not an unprimeable number, because it can be changed into a prime (166668581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33510 + ... + 38160.

It is an arithmetic number, because the mean of its divisors is an integer number (16677420).

Almost surely, 2^166668585 is an apocalyptic number.

166668585 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166668585 is a deficient number, since it is larger than the sum of its proper divisors (100170135).

166668585 is a wasteful number, since it uses less digits than its factorization.

166668585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7048.

The product of its digits is 2073600, while the sum is 51.

The square root of 166668585 is about 12910.0187838748. The cubic root of 166668585 is about 550.3233195400.

The spelling of 166668585 in words is "one hundred sixty-six million, six hundred sixty-eight thousand, five hundred eighty-five".