660485400 has 96 divisors (see below), whose sum is σ = 2097522000. Its totient is φ = 171827200.

The previous prime is 660485387. The next prime is 660485431. The reversal of 660485400 is 4584066.

It is a happy number.

660485400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×660485400² = 872481927226320000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11176 + ... + 38024.

Almost surely, 2^660485400 is an apocalyptic number.

660485400 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 660485400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1048761000).

660485400 is an abundant number, since it is smaller than the sum of its proper divisors (1437036600).

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

660485400 is a wasteful number, since it uses less digits than its factorization.

660485400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26909 (or 26900 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 660485400 is about 25699.9105056808. The cubic root of 660485400 is about 870.8721601292.

The spelling of 660485400 in words is "six hundred sixty million, four hundred eighty-five thousand, four hundred".