166666685203 has 8 divisors (see below), whose sum is σ = 176519194272. Its totient is φ = 156819574656.

The previous prime is 166666685149. The next prime is 166666685209. The reversal of 166666685203 is 302586666661.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166666685203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166666685209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1285975 + ... + 1409632.

It is an arithmetic number, because the mean of its divisors is an integer number (22064899284).

Almost surely, 2^166666685203 is an apocalyptic number.

166666685203 is a deficient number, since it is larger than the sum of its proper divisors (9852509069).

166666685203 is a wasteful number, since it uses less digits than its factorization.

166666685203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2699261.

The product of its (nonzero) digits is 11197440, while the sum is 55.

The spelling of 166666685203 in words is "one hundred sixty-six billion, six hundred sixty-six million, six hundred eighty-five thousand, two hundred three".