665933253 has 8 divisors (see below), whose sum is σ = 888833088. Its totient is φ = 443494464.

The previous prime is 665933251. The next prime is 665933267. The reversal of 665933253 is 352339566.

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

It is not a de Polignac number, because 665933253 - 2¹ = 665933251 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665933251) 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, 111876 + ... + 117677.

It is an arithmetic number, because the mean of its divisors is an integer number (111104136).

Almost surely, 2^665933253 is an apocalyptic number.

It is an amenable number.

665933253 is a deficient number, since it is larger than the sum of its proper divisors (222899835).

665933253 is a wasteful number, since it uses less digits than its factorization.

665933253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230523.

The product of its digits is 437400, while the sum is 42.

The square root of 665933253 is about 25805.6825718678. The cubic root of 665933253 is about 873.2599992648.

The spelling of 665933253 in words is "six hundred sixty-five million, nine hundred thirty-three thousand, two hundred fifty-three".