210166566666 has 32 divisors (see below), whose sum is σ = 490601594880. Its totient is φ = 58769981616.

The previous prime is 210166566529. The next prime is 210166566667. The reversal of 210166566666 is 666665661012.

It is not an unprimeable number, because it can be changed into a prime (210166566667) 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, 53231706 + ... + 53235653.

It is an arithmetic number, because the mean of its divisors is an integer number (15331299840).

Almost surely, 2^210166566666 is an apocalyptic number.

210166566666 is an abundant number, since it is smaller than the sum of its proper divisors (280435028214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210166566666 is a wasteful number, since it uses less digits than its factorization.

210166566666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106467418.

The product of its (nonzero) digits is 2799360, while the sum is 51.

The spelling of 210166566666 in words is "two hundred ten billion, one hundred sixty-six million, five hundred sixty-six thousand, six hundred sixty-six".