166104623 has 4 divisors (see below), whose sum is σ = 166192488. Its totient is φ = 166016760.

The previous prime is 166104619. The next prime is 166104667. The reversal of 166104623 is 326401661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 326401661 = 1471 ⋅221891.

It is a cyclic number.

It is not a de Polignac number, because 166104623 - 2² = 166104619 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 (166104613) 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, 41033 + ... + 44898.

It is an arithmetic number, because the mean of its divisors is an integer number (41548122).

Almost surely, 2^166104623 is an apocalyptic number.

166104623 is a deficient number, since it is larger than the sum of its proper divisors (87865).

166104623 is an equidigital number, since it uses as much as digits as its factorization.

166104623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87864.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 166104623 is about 12888.1582470111. The cubic root of 166104623 is about 549.7019023734.

The spelling of 166104623 in words is "one hundred sixty-six million, one hundred four thousand, six hundred twenty-three".