166982623 has 4 divisors (see below), whose sum is σ = 167731648. Its totient is φ = 166233600.

The previous prime is 166982617. The next prime is 166982633. The reversal of 166982623 is 326289661.

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

It is a cyclic number.

It is not a de Polignac number, because 166982623 - 2⁹ = 166982111 is a prime.

It is a super-3 number, since 3×166982623³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166982623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166982633) 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, 374178 + ... + 374623.

It is an arithmetic number, because the mean of its divisors is an integer number (41932912).

Almost surely, 2^166982623 is an apocalyptic number.

166982623 is a deficient number, since it is larger than the sum of its proper divisors (749025).

166982623 is an equidigital number, since it uses as much as digits as its factorization.

166982623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749024.

The product of its digits is 186624, while the sum is 43.

The square root of 166982623 is about 12922.1756295138. The cubic root of 166982623 is about 550.6687435717.

It can be divided in two parts, 16698 and 2623, that added together give a square (19321 = 139²).

The spelling of 166982623 in words is "one hundred sixty-six million, nine hundred eighty-two thousand, six hundred twenty-three".