166385223 has 24 divisors (see below), whose sum is σ = 253496880. Its totient is φ = 104872320.

The previous prime is 166385221. The next prime is 166385227. The reversal of 166385223 is 322583661.

It is a happy number.

166385223 is a `hidden beast` number, since 16 + 638 + 5 + 2 + 2 + 3 = 666.

It is not a de Polignac number, because 166385223 - 2¹ = 166385221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166385221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 162453 + ... + 163473.

It is an arithmetic number, because the mean of its divisors is an integer number (10562370).

Almost surely, 2^166385223 is an apocalyptic number.

166385223 is a deficient number, since it is larger than the sum of its proper divisors (87111657).

166385223 is a wasteful number, since it uses less digits than its factorization.

166385223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999 (or 1996 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 166385223 is about 12899.0396154132. The cubic root of 166385223 is about 550.0112647831.

The spelling of 166385223 in words is "one hundred sixty-six million, three hundred eighty-five thousand, two hundred twenty-three".