166229623 has 4 divisors (see below), whose sum is σ = 189976720. Its totient is φ = 142482528.

The previous prime is 166229617. The next prime is 166229627. The reversal of 166229623 is 326922661.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166229623 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 (166229627) 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 3 ways as a sum of consecutive naturals, for example, 11873538 + ... + 11873551.

It is an arithmetic number, because the mean of its divisors is an integer number (47494180).

Almost surely, 2^166229623 is an apocalyptic number.

166229623 is a deficient number, since it is larger than the sum of its proper divisors (23747097).

166229623 is an equidigital number, since it uses as much as digits as its factorization.

166229623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23747096.

The product of its digits is 46656, while the sum is 37.

The square root of 166229623 is about 12893.0067478459. The cubic root of 166229623 is about 549.8397582770.

The spelling of 166229623 in words is "one hundred sixty-six million, two hundred twenty-nine thousand, six hundred twenty-three".