666822206 has 16 divisors (see below), whose sum is σ = 1012362624. Its totient is φ = 329383704.

The previous prime is 666822197. The next prime is 666822239. The reversal of 666822206 is 602228666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 666822206.

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, 87605 + ... + 94911.

It is an arithmetic number, because the mean of its divisors is an integer number (63272664).

Almost surely, 2^666822206 is an apocalyptic number.

666822206 is a deficient number, since it is larger than the sum of its proper divisors (345540418).

666822206 is a wasteful number, since it uses less digits than its factorization.

666822206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7855.

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 666822206 is about 25822.9008052930. The cubic root of 666822206 is about 873.6483975150.

The spelling of 666822206 in words is "six hundred sixty-six million, eight hundred twenty-two thousand, two hundred six".