166663685 has 8 divisors (see below), whose sum is σ = 200071680. Its totient is φ = 133280784.

The previous prime is 166663669. The next prime is 166663691. The reversal of 166663685 is 586366661.

166663685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166663685 - 2⁴ = 166663669 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14756 + ... + 23474.

It is an arithmetic number, because the mean of its divisors is an integer number (25008960).

Almost surely, 2^166663685 is an apocalyptic number.

It is an amenable number.

166663685 is a deficient number, since it is larger than the sum of its proper divisors (33407995).

166663685 is an equidigital number, since it uses as much as digits as its factorization.

166663685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12547.

The product of its digits is 933120, while the sum is 47.

The square root of 166663685 is about 12909.8290073881. The cubic root of 166663685 is about 550.3179263807.

The spelling of 166663685 in words is "one hundred sixty-six million, six hundred sixty-three thousand, six hundred eighty-five".