166321368 has 24 divisors (see below), whose sum is σ = 450453900. Its totient is φ = 55440432.

The previous prime is 166321361. The next prime is 166321369. The reversal of 166321368 is 863123661.

166321368 is a `hidden beast` number, since 1 + 6 + 632 + 13 + 6 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166321361) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1154938 + ... + 1155081.

Almost surely, 2^166321368 is an apocalyptic number.

166321368 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

166321368 is an abundant number, since it is smaller than the sum of its proper divisors (284132532).

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

166321368 is a wasteful number, since it uses less digits than its factorization.

166321368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2310031 (or 2310024 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 166321368 is about 12896.5641936137. The cubic root of 166321368 is about 549.9408950260.

The spelling of 166321368 in words is "one hundred sixty-six million, three hundred twenty-one thousand, three hundred sixty-eight".