166423359 has 4 divisors (see below), whose sum is σ = 221897816. Its totient is φ = 110948904.

The previous prime is 166423357. The next prime is 166423379. The reversal of 166423359 is 953324661.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 166423359 - 2¹ = 166423357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166423357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27737224 + ... + 27737229.

It is an arithmetic number, because the mean of its divisors is an integer number (55474454).

Almost surely, 2^166423359 is an apocalyptic number.

166423359 is a deficient number, since it is larger than the sum of its proper divisors (55474457).

166423359 is an equidigital number, since it uses as much as digits as its factorization.

166423359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55474456.

The product of its digits is 116640, while the sum is 39.

The square root of 166423359 is about 12900.5177803063. The cubic root of 166423359 is about 550.0532829921.

The spelling of 166423359 in words is "one hundred sixty-six million, four hundred twenty-three thousand, three hundred fifty-nine".