166235623 has 4 divisors (see below), whose sum is σ = 166261680. Its totient is φ = 166209568.

The previous prime is 166235611. The next prime is 166235633. The reversal of 166235623 is 326532661.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 166235623 - 2⁵ = 166235591 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 (166235603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3711 + ... + 18607.

It is an arithmetic number, because the mean of its divisors is an integer number (41565420).

Almost surely, 2^166235623 is an apocalyptic number.

166235623 is a deficient number, since it is larger than the sum of its proper divisors (26057).

166235623 is a wasteful number, since it uses less digits than its factorization.

166235623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26056.

The product of its digits is 38880, while the sum is 34.

The square root of 166235623 is about 12893.2394300269. The cubic root of 166235623 is about 549.8463736219.

The spelling of 166235623 in words is "one hundred sixty-six million, two hundred thirty-five thousand, six hundred twenty-three".