249998166 has 24 divisors (see below), whose sum is σ = 590905224. Its totient is φ = 75756960.

The previous prime is 249998131. The next prime is 249998213. The reversal of 249998166 is 661899942.

249998166 is a `hidden beast` number, since 2 + 499 + 98 + 1 + 66 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 631111 + ... + 631506.

It is an arithmetic number, because the mean of its divisors is an integer number (24621051).

Almost surely, 2^249998166 is an apocalyptic number.

249998166 is an abundant number, since it is smaller than the sum of its proper divisors (340907058).

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

249998166 is a wasteful number, since it uses less digits than its factorization.

249998166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1262636 (or 1262633 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The square root of 249998166 is about 15811.3303045632. The cubic root of 249998166 is about 629.9589844802.

The spelling of 249998166 in words is "two hundred forty-nine million, nine hundred ninety-eight thousand, one hundred sixty-six".