665133000 has 256 divisors, whose sum is σ = 2497996800. Its totient is φ = 143942400.

The previous prime is 665132989. The next prime is 665133017. The reversal of 665133000 is 331566.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 398167 + ... + 399833.

It is an arithmetic number, because the mean of its divisors is an integer number (9757800).

Almost surely, 2^665133000 is an apocalyptic number.

665133000 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 665133000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1248998400).

665133000 is an abundant number, since it is smaller than the sum of its proper divisors (1832863800).

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

665133000 is a wasteful number, since it uses less digits than its factorization.

665133000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1717 (or 1703 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 665133000 is about 25790.1725469218. The cubic root of 665133000 is about 872.9100597646.

Adding to 665133000 its reverse (331566), we get a palindrome (665464566).

The spelling of 665133000 in words is "six hundred sixty-five million, one hundred thirty-three thousand".