660315900 has 72 divisors (see below), whose sum is σ = 1918651504. Its totient is φ = 175334400.

The previous prime is 660315889. The next prime is 660315917. The reversal of 660315900 is 9513066.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 67734 + ... + 76866.

Almost surely, 2^660315900 is an apocalyptic number.

660315900 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 660315900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (959325752).

660315900 is an abundant number, since it is smaller than the sum of its proper divisors (1258335604).

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

660315900 is a wasteful number, since it uses less digits than its factorization.

660315900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9391 (or 9384 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 660315900 is about 25696.6126172303. The cubic root of 660315900 is about 870.7976566099.

Adding to 660315900 its reverse (9513066), we get a palindrome (669828966).

The spelling of 660315900 in words is "six hundred sixty million, three hundred fifteen thousand, nine hundred".