166555360 has 48 divisors (see below), whose sum is σ = 396370800. Its totient is φ = 66134016.

The previous prime is 166555331. The next prime is 166555369. The reversal of 166555360 is 63555661.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166555369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18496 + ... + 25984.

It is an arithmetic number, because the mean of its divisors is an integer number (8257725).

Almost surely, 2^166555360 is an apocalyptic number.

166555360 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 166555360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198185400).

166555360 is an abundant number, since it is smaller than the sum of its proper divisors (229815440).

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

166555360 is a wasteful number, since it uses less digits than its factorization.

166555360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7643 (or 7635 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 37.

The square root of 166555360 is about 12905.6328787084. The cubic root of 166555360 is about 550.1986720283.

The spelling of 166555360 in words is "one hundred sixty-six million, five hundred fifty-five thousand, three hundred sixty".