660549120 has 320 divisors, whose sum is σ = 2635117056. Its totient is φ = 137134080.

The previous prime is 660549103. The next prime is 660549133. The reversal of 660549120 is 21945066.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

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, 590802 + ... + 591918.

Almost surely, 2^660549120 is an apocalyptic number.

660549120 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 660549120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1317558528).

660549120 is an abundant number, since it is smaller than the sum of its proper divisors (1974567936).

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

660549120 is a wasteful number, since it uses less digits than its factorization.

660549120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161 (or 1145 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 660549120 is about 25701.1501688154. The cubic root of 660549120 is about 870.9001648813.

The spelling of 660549120 in words is "six hundred sixty million, five hundred forty-nine thousand, one hundred twenty".