166000000 has 112 divisors (see below), whose sum is σ = 418354020. Its totient is φ = 65600000.

The previous prime is 165999997. The next prime is 166000007. The reversal of 166000000 is 661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166000007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 1999959 + ... + 2000041.

Almost surely, 2^166000000 is an apocalyptic number.

166000000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209177010).

166000000 is an abundant number, since it is smaller than the sum of its proper divisors (252354020).

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

166000000 is an frugal number, since it uses more digits than its factorization.

166000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 166000000 is about 12884.0987267251. The cubic root of 166000000 is about 549.5864660095.

Adding to 166000000 its reverse (661), we get a palindrome (166000661).

The spelling of 166000000 in words is "one hundred sixty-six million", and thus it is an aban number.