166120650 has 72 divisors (see below), whose sum is σ = 448123104. Its totient is φ = 44119200.

The previous prime is 166120649. The next prime is 166120657. The reversal of 166120650 is 56021661.

It is a happy number.

166120650 is a `hidden beast` number, since 1 + 6 + 6 + 1 + 2 + 0 + 650 = 666.

It is not an unprimeable number, because it can be changed into a prime (166120657) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 139357 + ... + 140543.

It is an arithmetic number, because the mean of its divisors is an integer number (6223932).

Almost surely, 2^166120650 is an apocalyptic number.

166120650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 166120650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224061552).

166120650 is an abundant number, since it is smaller than the sum of its proper divisors (282002454).

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

166120650 is a wasteful number, since it uses less digits than its factorization.

166120650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1516 (or 1508 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 166120650 is about 12888.7800043293. The cubic root of 166120650 is about 549.7195815704.

The spelling of 166120650 in words is "one hundred sixty-six million, one hundred twenty thousand, six hundred fifty".