166888815206 has 16 divisors (see below), whose sum is σ = 252262256688. Its totient is φ = 82802995200.

The previous prime is 166888815173. The next prime is 166888815221. The reversal of 166888815206 is 602518888661.

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, 190355 + ... + 608286.

It is an arithmetic number, because the mean of its divisors is an integer number (15766391043).

Almost surely, 2^166888815206 is an apocalyptic number.

166888815206 is a deficient number, since it is larger than the sum of its proper divisors (85373441482).

166888815206 is a wasteful number, since it uses less digits than its factorization.

166888815206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799447.

The product of its (nonzero) digits is 8847360, while the sum is 59.

The spelling of 166888815206 in words is "one hundred sixty-six billion, eight hundred eighty-eight million, eight hundred fifteen thousand, two hundred six".