166666755626 has 16 divisors (see below), whose sum is σ = 285755662080. Its totient is φ = 71418303600.

The previous prime is 166666755613. The next prime is 166666755641. The reversal of 166666755626 is 626557666661.

It is a happy 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, 757925 + ... + 952776.

It is an arithmetic number, because the mean of its divisors is an integer number (17859728880).

Almost surely, 2^166666755626 is an apocalyptic number.

166666755626 is a deficient number, since it is larger than the sum of its proper divisors (119088906454).

166666755626 is a wasteful number, since it uses less digits than its factorization.

166666755626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1717669.

The product of its digits is 97977600, while the sum is 62.

The spelling of 166666755626 in words is "one hundred sixty-six billion, six hundred sixty-six million, seven hundred fifty-five thousand, six hundred twenty-six".