660203400 has 96 divisors (see below), whose sum is σ = 2051252640. Its totient is φ = 175656960.

The previous prime is 660203387. The next prime is 660203413. The reversal of 660203400 is 4302066.

It is an interprime number because it is at equal distance from previous prime (660203387) and next prime (660203413).

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, 345247 + ... + 347153.

It is an arithmetic number, because the mean of its divisors is an integer number (21367215).

Almost surely, 2^660203400 is an apocalyptic number.

660203400 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 660203400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1025626320).

660203400 is an abundant number, since it is smaller than the sum of its proper divisors (1391049240).

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

660203400 is a wasteful number, since it uses less digits than its factorization.

660203400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2503 (or 2494 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 660203400 is about 25694.4235195110. The cubic root of 660203400 is about 870.7482003318.

Adding to 660203400 its reverse (4302066), we get a palindrome (664505466).

The spelling of 660203400 in words is "six hundred sixty million, two hundred three thousand, four hundred".