166249863 has 18 divisors (see below), whose sum is σ = 260034216. Its totient is φ = 102306672.

The previous prime is 166249823. The next prime is 166249871. The reversal of 166249863 is 368942661.

166249863 is a `hidden beast` number, since 16 + 624 + 9 + 8 + 6 + 3 = 666.

166249863 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 166249863 - 2⁶ = 166249799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166249823) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 53131 + ... + 56172.

Almost surely, 2^166249863 is an apocalyptic number.

166249863 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

166249863 is a deficient number, since it is larger than the sum of its proper divisors (93784353).

166249863 is a wasteful number, since it uses less digits than its factorization.

166249863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109335 (or 109319 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 166249863 is about 12893.7916455944. The cubic root of 166249863 is about 549.8620734032.

The spelling of 166249863 in words is "one hundred sixty-six million, two hundred forty-nine thousand, eight hundred sixty-three".