166667223 has 16 divisors (see below), whose sum is σ = 232586496. Its totient is φ = 105959040.

The previous prime is 166667197. The next prime is 166667227. The reversal of 166667223 is 322766661.

It is not a de Polignac number, because 166667223 - 2⁹ = 166666711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166667227) 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, 20463 + ... + 27423.

It is an arithmetic number, because the mean of its divisors is an integer number (14536656).

Almost surely, 2^166667223 is an apocalyptic number.

166667223 is a deficient number, since it is larger than the sum of its proper divisors (65919273).

166667223 is a wasteful number, since it uses less digits than its factorization.

166667223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7334.

The product of its digits is 108864, while the sum is 39.

The square root of 166667223 is about 12909.9660340374. The cubic root of 166667223 is about 550.3218204725.

The spelling of 166667223 in words is "one hundred sixty-six million, six hundred sixty-seven thousand, two hundred twenty-three".