666364253 has 4 divisors (see below), whose sum is σ = 666976128. Its totient is φ = 665752380.

The previous prime is 666364241. The next prime is 666364297. The reversal of 666364253 is 352463666.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666364253 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 666364253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666364213) 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, 304301 + ... + 306482.

It is an arithmetic number, because the mean of its divisors is an integer number (166744032).

Almost surely, 2^666364253 is an apocalyptic number.

It is an amenable number.

666364253 is a deficient number, since it is larger than the sum of its proper divisors (611875).

666364253 is a wasteful number, since it uses less digits than its factorization.

666364253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611874.

The product of its digits is 466560, while the sum is 41.

The square root of 666364253 is about 25814.0320949673. The cubic root of 666364253 is about 873.4483534224.

The spelling of 666364253 in words is "six hundred sixty-six million, three hundred sixty-four thousand, two hundred fifty-three".