665336413 has 4 divisors (see below), whose sum is σ = 760384480. Its totient is φ = 570288348.

The previous prime is 665336411. The next prime is 665336417. The reversal of 665336413 is 314633566.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 665336413 - 2¹ = 665336411 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665336411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47524023 + ... + 47524036.

It is an arithmetic number, because the mean of its divisors is an integer number (190096120).

Almost surely, 2^665336413 is an apocalyptic number.

It is an amenable number.

665336413 is a deficient number, since it is larger than the sum of its proper divisors (95048067).

665336413 is an equidigital number, since it uses as much as digits as its factorization.

665336413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95048066.

The product of its digits is 116640, while the sum is 37.

The square root of 665336413 is about 25794.1158600174. The cubic root of 665336413 is about 872.9990360326. Note that the first 3 decimals are identical.

Adding to 665336413 its reverse (314633566), we get a palindrome (979969979).

The spelling of 665336413 in words is "six hundred sixty-five million, three hundred thirty-six thousand, four hundred thirteen".