660804480 has 384 divisors, whose sum is σ = 2708858880. Its totient is φ = 150792192.

The previous prime is 660804413. The next prime is 660804499. The reversal of 660804480 is 84408066.

660804480 is a `hidden beast` number, since 6 + 608 + 0 + 4 + 48 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

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 47 ways as a sum of consecutive naturals, for example, 1088337 + ... + 1088943.

It is an arithmetic number, because the mean of its divisors is an integer number (7054320).

Almost surely, 2^660804480 is an apocalyptic number.

660804480 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 660804480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1354429440).

660804480 is an abundant number, since it is smaller than the sum of its proper divisors (2048054400).

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

660804480 is an equidigital number, since it uses as much as digits as its factorization.

660804480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648 (or 624 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 660804480 is about 25706.1175598339. The cubic root of 660804480 is about 871.0123767806.

The spelling of 660804480 in words is "six hundred sixty million, eight hundred four thousand, four hundred eighty".