858249166 has 4 divisors (see below), whose sum is σ = 1287373752. Its totient is φ = 429124582.

The previous prime is 858249157. The next prime is 858249179. The reversal of 858249166 is 661942858.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 214562290 + ... + 214562293.

It is an arithmetic number, because the mean of its divisors is an integer number (321843438).

Almost surely, 2^858249166 is an apocalyptic number.

858249166 is a deficient number, since it is larger than the sum of its proper divisors (429124586).

858249166 is a wasteful number, since it uses less digits than its factorization.

858249166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429124585.

The product of its digits is 829440, while the sum is 49.

The square root of 858249166 is about 29295.8899165054. The cubic root of 858249166 is about 950.3227586603.

The spelling of 858249166 in words is "eight hundred fifty-eight million, two hundred forty-nine thousand, one hundred sixty-six".