166944499 has 4 divisors (see below), whose sum is σ = 167423200. Its totient is φ = 166465800.

The previous prime is 166944487. The next prime is 166944521. The reversal of 166944499 is 994449661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 994449661 = 59 ⋅16855079.

It is a cyclic number.

It is not a de Polignac number, because 166944499 - 2⁵ = 166944467 is a prime.

It is a super-2 number, since 2×166944499² = 55740931492722002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166944439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238827 + ... + 239524.

It is an arithmetic number, because the mean of its divisors is an integer number (41855800).

Almost surely, 2^166944499 is an apocalyptic number.

166944499 is a deficient number, since it is larger than the sum of its proper divisors (478701).

166944499 is an equidigital number, since it uses as much as digits as its factorization.

166944499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478700.

The product of its digits is 1679616, while the sum is 52.

The square root of 166944499 is about 12920.7004067117. The cubic root of 166944499 is about 550.6268324380.

The spelling of 166944499 in words is "one hundred sixty-six million, nine hundred forty-four thousand, four hundred ninety-nine".