665135130 has 96 divisors (see below), whose sum is σ = 1771761600. Its totient is φ = 158484480.

The previous prime is 665135129. The next prime is 665135167. The reversal of 665135130 is 31531566.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1481146 + ... + 1481594.

It is an arithmetic number, because the mean of its divisors is an integer number (18455850).

Almost surely, 2^665135130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 665135130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (885880800).

665135130 is an abundant number, since it is smaller than the sum of its proper divisors (1106626470).

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

665135130 is a wasteful number, since it uses less digits than its factorization.

665135130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604 (or 537 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 665135130 is about 25790.2138416881. The cubic root of 665135130 is about 872.9109915564.

Adding to 665135130 its reverse (31531566), we get a palindrome (696666696).

The spelling of 665135130 in words is "six hundred sixty-five million, one hundred thirty-five thousand, one hundred thirty".