166612580 has 48 divisors (see below), whose sum is σ = 375217920. Its totient is φ = 61920768.

The previous prime is 166612559. The next prime is 166612583. The reversal of 166612580 is 85216661.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 166612580.

It is not an unprimeable number, because it can be changed into a prime (166612583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23759 + ... + 29961.

It is an arithmetic number, because the mean of its divisors is an integer number (7817040).

Almost surely, 2^166612580 is an apocalyptic number.

166612580 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 166612580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187608960).

166612580 is an abundant number, since it is smaller than the sum of its proper divisors (208605340).

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

166612580 is a wasteful number, since it uses less digits than its factorization.

166612580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6308 (or 6306 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 166612580 is about 12907.8495497895. The cubic root of 166612580 is about 550.2616716289.

The spelling of 166612580 in words is "one hundred sixty-six million, six hundred twelve thousand, five hundred eighty".