166423611 has 8 divisors (see below), whose sum is σ = 223312144. Its totient is φ = 110242080.

The previous prime is 166423597. The next prime is 166423619. The reversal of 166423611 is 116324661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166423611 - 2¹⁸ = 166161467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166423619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176200 + ... + 177141.

It is an arithmetic number, because the mean of its divisors is an integer number (27914018).

Almost surely, 2^166423611 is an apocalyptic number.

166423611 is a deficient number, since it is larger than the sum of its proper divisors (56888533).

166423611 is a wasteful number, since it uses less digits than its factorization.

166423611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353501.

The product of its digits is 5184, while the sum is 30.

The square root of 166423611 is about 12900.5275473525. The cubic root of 166423611 is about 550.0535606242.

The spelling of 166423611 in words is "one hundred sixty-six million, four hundred twenty-three thousand, six hundred eleven".