663665465 has 8 divisors (see below), whose sum is σ = 843245640. Its totient is φ = 499700992.

The previous prime is 663665461. The next prime is 663665473. The reversal of 663665465 is 564566366.

It can be written as a sum of positive squares in 4 ways, for example, as 309021241 + 354644224 = 17579^2 + 18832^2 .

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

It is not a de Polignac number, because 663665465 - 2² = 663665461 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (663665461) 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, 3903830 + ... + 3903999.

It is an arithmetic number, because the mean of its divisors is an integer number (105405705).

Almost surely, 2^663665465 is an apocalyptic number.

It is an amenable number.

663665465 is a deficient number, since it is larger than the sum of its proper divisors (179580175).

663665465 is a wasteful number, since it uses less digits than its factorization.

663665465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7807851.

The product of its digits is 2332800, while the sum is 47.

The square root of 663665465 is about 25761.7053977410. The cubic root of 663665465 is about 872.2675970973.

Subtracting from 663665465 its reverse (564566366), we obtain a palindrome (99099099).

The spelling of 663665465 in words is "six hundred sixty-three million, six hundred sixty-five thousand, four hundred sixty-five".