166200720 has 80 divisors (see below), whose sum is σ = 588831360. Its totient is φ = 37988352.

The previous prime is 166200679. The next prime is 166200731. The reversal of 166200720 is 27002661.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47785 + ... + 51144.

It is an arithmetic number, because the mean of its divisors is an integer number (7360392).

Almost surely, 2^166200720 is an apocalyptic number.

166200720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166200720 is an abundant number, since it is smaller than the sum of its proper divisors (422630640).

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

166200720 is a wasteful number, since it uses less digits than its factorization.

166200720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98952 (or 98946 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 166200720 is about 12891.8858201584. The cubic root of 166200720 is about 549.8078888276.

The spelling of 166200720 in words is "one hundred sixty-six million, two hundred thousand, seven hundred twenty".