166661222 has 32 divisors (see below), whose sum is σ = 311169600. Its totient is φ = 65184768.

The previous prime is 166661221. The next prime is 166661237. The reversal of 166661222 is 222166661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166661221) 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, 11054 + ... + 21342.

It is an arithmetic number, because the mean of its divisors is an integer number (9724050).

Almost surely, 2^166661222 is an apocalyptic number.

166661222 is a deficient number, since it is larger than the sum of its proper divisors (144508378).

166661222 is a wasteful number, since it uses less digits than its factorization.

166661222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10400.

The product of its digits is 10368, while the sum is 32.

The square root of 166661222 is about 12909.7336146026. The cubic root of 166661222 is about 550.3152154528.

The spelling of 166661222 in words is "one hundred sixty-six million, six hundred sixty-one thousand, two hundred twenty-two".