665030500 has 24 divisors (see below), whose sum is σ = 1452427704. Its totient is φ = 266012000.

The previous prime is 665030459. The next prime is 665030501. The reversal of 665030500 is 5030566.

It can be written as a sum of positive squares in 4 ways, for example, as 13351716 + 651678784 = 3654^2 + 25528^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (665030501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 664531 + ... + 665530.

It is an arithmetic number, because the mean of its divisors is an integer number (60517821).

Almost surely, 2^665030500 is an apocalyptic number.

It is an amenable number.

665030500 is an abundant number, since it is smaller than the sum of its proper divisors (787397204).

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

665030500 is a wasteful number, since it uses less digits than its factorization.

665030500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330080 (or 1330068 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 665030500 is about 25788.1852793096. The cubic root of 665030500 is about 872.8652176665.

The spelling of 665030500 in words is "six hundred sixty-five million, thirty thousand, five hundred".