166002623 has 4 divisors (see below), whose sum is σ = 167021208. Its totient is φ = 164984040.

The previous prime is 166002619. The next prime is 166002647. The reversal of 166002623 is 326200661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 326200661 = 2609 ⋅125029.

It is a cyclic number.

It is not a de Polignac number, because 166002623 - 2² = 166002619 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166002592 and 166002601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166002673) 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, 509048 + ... + 509373.

It is an arithmetic number, because the mean of its divisors is an integer number (41755302).

Almost surely, 2^166002623 is an apocalyptic number.

166002623 is a deficient number, since it is larger than the sum of its proper divisors (1018585).

166002623 is a wasteful number, since it uses less digits than its factorization.

166002623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018584.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 166002623 is about 12884.2005184645. The cubic root of 166002623 is about 549.5893607037.

The spelling of 166002623 in words is "one hundred sixty-six million, two thousand, six hundred twenty-three".