665450313 has 8 divisors (see below), whose sum is σ = 967927776. Its totient is φ = 403303200.

The previous prime is 665450311. The next prime is 665450347. The reversal of 665450313 is 313054566.

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

It is not a de Polignac number, because 665450313 - 2¹ = 665450311 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 20165161 = 665450313 / (6 + 6 + 5 + 4 + 5 + 0 + 3 + 1 + 3).

It is not an unprimeable number, because it can be changed into a prime (665450311) 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, 10082548 + ... + 10082613.

It is an arithmetic number, because the mean of its divisors is an integer number (120990972).

Almost surely, 2^665450313 is an apocalyptic number.

It is an amenable number.

665450313 is a deficient number, since it is larger than the sum of its proper divisors (302477463).

665450313 is a wasteful number, since it uses less digits than its factorization.

665450313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20165175.

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

The square root of 665450313 is about 25796.3236334172. The cubic root of 665450313 is about 873.0488498886.

The spelling of 665450313 in words is "six hundred sixty-five million, four hundred fifty thousand, three hundred thirteen".