665135430 has 32 divisors (see below), whose sum is σ = 1602026208. Its totient is φ = 176736000.

The previous prime is 665135417. The next prime is 665135431. The reversal of 665135430 is 34531566.

It is a junction number, because it is equal to n+sod(n) for n = 665135391 and 665135400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665135431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31021 + ... + 47880.

It is an arithmetic number, because the mean of its divisors is an integer number (50063319).

Almost surely, 2^665135430 is an apocalyptic number.

665135430 is an abundant number, since it is smaller than the sum of its proper divisors (936890778).

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

665135430 is a wasteful number, since it uses less digits than its factorization.

665135430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79192.

The product of its (nonzero) digits is 32400, while the sum is 33.

The square root of 665135430 is about 25790.2196578470. The cubic root of 665135430 is about 872.9111227945.

Adding to 665135430 its reverse (34531566), we get a palindrome (699666996).

The spelling of 665135430 in words is "six hundred sixty-five million, one hundred thirty-five thousand, four hundred thirty".