166649896 has 32 divisors (see below), whose sum is σ = 359317440. Its totient is φ = 70979328.

The previous prime is 166649869. The next prime is 166649909. The reversal of 166649896 is 698946661.

166649896 is a nontrivial binomial coefficient, being equal to C(18257, 2).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1 + ... + 18256.

It is an arithmetic number, because the mean of its divisors is an integer number (11228670).

Almost surely, 2^166649896 is an apocalyptic number.

166649896 is the 18256-th triangular number.

166649896 is the 6086-th centered nonagonal number.

It is an amenable number.

166649896 is an abundant number, since it is smaller than the sum of its proper divisors (192667544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166649896 is a wasteful number, since it uses less digits than its factorization.

166649896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18433 (or 18429 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 55.

The square root of 166649896 is about 12909.2949458907. The cubic root of 166649896 is about 550.3027490229.

The spelling of 166649896 in words is "one hundred sixty-six million, six hundred forty-nine thousand, eight hundred ninety-six".