665282566 has 8 divisors (see below), whose sum is σ = 1074687264. Its totient is φ = 307053480.

The previous prime is 665282561. The next prime is 665282581.

665282566 is nontrivially palindromic in base 10.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665282561) 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, 12793870 + ... + 12793921.

It is an arithmetic number, because the mean of its divisors is an integer number (134335908).

Almost surely, 2^665282566 is an apocalyptic number.

665282566 is a deficient number, since it is larger than the sum of its proper divisors (409404698).

665282566 is a wasteful number, since it uses less digits than its factorization.

665282566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25587806.

The product of its digits is 1036800, while the sum is 46.

The square root of 665282566 is about 25793.0720543327. The cubic root of 665282566 is about 872.9754842141.

The spelling of 665282566 in words is "six hundred sixty-five million, two hundred eighty-two thousand, five hundred sixty-six".