665066023 has 8 divisors (see below), whose sum is σ = 669355200. Its totient is φ = 660791040.

The previous prime is 665066021. The next prime is 665066029. The reversal of 665066023 is 320660566.

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 665066023 - 2¹ = 665066021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 665066023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665066021) 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, 99903 + ... + 106351.

It is an arithmetic number, because the mean of its divisors is an integer number (83669400).

Almost surely, 2^665066023 is an apocalyptic number.

665066023 is a deficient number, since it is larger than the sum of its proper divisors (4289177).

665066023 is a wasteful number, since it uses less digits than its factorization.

665066023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7097.

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 665066023 is about 25788.8740157456. The cubic root of 665066023 is about 872.8807589282.

The spelling of 665066023 in words is "six hundred sixty-five million, sixty-six thousand, twenty-three".