166361850 has 60 divisors (see below), whose sum is σ = 462250734. Its totient is φ = 44362080.

The previous prime is 166361849. The next prime is 166361857. The reversal of 166361850 is 58163661.

It is a happy number.

166361850 is a `hidden beast` number, since 1 + 6 + 636 + 18 + 5 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 154480041 + 11881809 = 12429^2 + 3447^2 .

It is not an unprimeable number, because it can be changed into a prime (166361857) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 16489 + ... + 24588.

Almost surely, 2^166361850 is an apocalyptic number.

166361850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166361850 is an abundant number, since it is smaller than the sum of its proper divisors (295888884).

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

166361850 is a wasteful number, since it uses less digits than its factorization.

166361850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41101 (or 41087 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 166361850 is about 12898.1335859108. The cubic root of 166361850 is about 549.9855092601.

The spelling of 166361850 in words is "one hundred sixty-six million, three hundred sixty-one thousand, eight hundred fifty".