166672223 has 2 divisors, whose sum is σ = 166672224. Its totient is φ = 166672222.

The previous prime is 166672211. The next prime is 166672229. The reversal of 166672223 is 322276661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166672223 - 2¹² = 166668127 is a prime.

It is a Sophie Germain prime.

It is a plaindrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166672229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83336111 + 83336112.

It is an arithmetic number, because the mean of its divisors is an integer number (83336112).

Almost surely, 2^166672223 is an apocalyptic number.

166672223 is a deficient number, since it is larger than the sum of its proper divisors (1).

166672223 is an equidigital number, since it uses as much as digits as its factorization.

166672223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 35.

The square root of 166672223 is about 12910.1596814292. The cubic root of 166672223 is about 550.3273236173.

The spelling of 166672223 in words is "one hundred sixty-six million, six hundred seventy-two thousand, two hundred twenty-three".