166651560 has 128 divisors (see below), whose sum is σ = 579744000. Its totient is φ = 42501888.

The previous prime is 166651553. The next prime is 166651607. The reversal of 166651560 is 65156661.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21486 + ... + 28194.

It is an arithmetic number, because the mean of its divisors is an integer number (4529250).

Almost surely, 2^166651560 is an apocalyptic number.

166651560 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 166651560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289872000).

166651560 is an abundant number, since it is smaller than the sum of its proper divisors (413092440).

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

166651560 is a wasteful number, since it uses less digits than its factorization.

166651560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6752 (or 6742 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 166651560 is about 12909.3593954154. The cubic root of 166651560 is about 550.3045806086.

It can be divided in two parts, 16665 and 1560, that added together give a square (18225 = 135²).

The spelling of 166651560 in words is "one hundred sixty-six million, six hundred fifty-one thousand, five hundred sixty".