665024666 has 8 divisors (see below), whose sum is σ = 1056215700. Its totient is φ = 312952768.

The previous prime is 665024663. The next prime is 665024669. The reversal of 665024666 is 666420566.

It is an interprime number because it is at equal distance from previous prime (665024663) and next prime (665024669).

It can be written as a sum of positive squares in 2 ways, for example, as 664350625 + 674041 = 25775^2 + 821^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (665024663) 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, 9779741 + ... + 9779808.

Almost surely, 2^665024666 is an apocalyptic number.

665024666 is a deficient number, since it is larger than the sum of its proper divisors (391191034).

665024666 is a wasteful number, since it uses less digits than its factorization.

665024666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19559568.

The product of its (nonzero) digits is 311040, while the sum is 41.

The square root of 665024666 is about 25788.0721652473. The cubic root of 665024666 is about 872.8626652470.

The spelling of 665024666 in words is "six hundred sixty-five million, twenty-four thousand, six hundred sixty-six".