660083580 has 180 divisors, whose sum is σ = 2243174472. Its totient is φ = 162414720.

The previous prime is 660083573. The next prime is 660083591. The reversal of 660083580 is 85380066.

660083580 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (180).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 272575 + ... + 274985.

Almost surely, 2^660083580 is an apocalyptic number.

660083580 is a gapful number since it is divisible by the number (60) 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 660083580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1121587236).

660083580 is an abundant number, since it is smaller than the sum of its proper divisors (1583090892).

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

660083580 is a wasteful number, since it uses less digits than its factorization.

660083580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2458 (or 2434 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 660083580 is about 25692.0917793783. The cubic root of 660083580 is about 870.6955199196.

The spelling of 660083580 in words is "six hundred sixty million, eighty-three thousand, five hundred eighty".