660089088 has 180 divisors, whose sum is σ = 1991452848. Its totient is φ = 218350080.

The previous prime is 660089069. The next prime is 660089093. The reversal of 660089088 is 880980066.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5038783 + ... + 5038913.

Almost surely, 2^660089088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660089088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (995726424).

660089088 is an abundant number, since it is smaller than the sum of its proper divisors (1331363760).

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

660089088 is an frugal number, since it uses more digits than its factorization.

660089088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 660089088 is about 25692.1989716723. The cubic root of 660089088 is about 870.6979417228.

The spelling of 660089088 in words is "six hundred sixty million, eighty-nine thousand, eighty-eight".