166000660 has 96 divisors (see below), whose sum is σ = 429391872. Its totient is φ = 52652160.

The previous prime is 166000657. The next prime is 166000661. The reversal of 166000660 is 66000661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166000661) 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 31 ways as a sum of consecutive naturals, for example, 98989 + ... + 100651.

It is an arithmetic number, because the mean of its divisors is an integer number (4472832).

Almost surely, 2^166000660 is an apocalyptic number.

166000660 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 166000660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214695936).

166000660 is an abundant number, since it is smaller than the sum of its proper divisors (263391212).

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

166000660 is a wasteful number, since it uses less digits than its factorization.

166000660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1733 (or 1731 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 166000660 is about 12884.1243396670. The cubic root of 166000660 is about 549.5871943761.

Subtracting from 166000660 its reverse (66000661), we obtain a palindrome (99999999).

The spelling of 166000660 in words is "one hundred sixty-six million, six hundred sixty", and thus it is an aban number.