665340113 has 8 divisors (see below), whose sum is σ = 694830528. Its totient is φ = 635896624.

The previous prime is 665340107. The next prime is 665340163. The reversal of 665340113 is 311043566.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 665340113 - 2⁴ = 665340097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665340163) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 18995 + ... + 41127.

It is an arithmetic number, because the mean of its divisors is an integer number (86853816).

Almost surely, 2^665340113 is an apocalyptic number.

It is an amenable number.

665340113 is a deficient number, since it is larger than the sum of its proper divisors (29490415).

665340113 is a wasteful number, since it uses less digits than its factorization.

665340113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23463.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 665340113 is about 25794.1875817014. The cubic root of 665340113 is about 873.0006543069. Note that the first 3 decimals are identical.

Adding to 665340113 its reverse (311043566), we get a palindrome (976383679).

The spelling of 665340113 in words is "six hundred sixty-five million, three hundred forty thousand, one hundred thirteen".