664349253 has 8 divisors (see below), whose sum is σ = 886709568. Its totient is φ = 442444224.

The previous prime is 664349243. The next prime is 664349297. The reversal of 664349253 is 352943466.

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

It is not a de Polignac number, because 664349253 - 2¹⁰ = 664348229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664349243) 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, 110401 + ... + 116262.

It is an arithmetic number, because the mean of its divisors is an integer number (110838696).

Almost surely, 2^664349253 is an apocalyptic number.

It is an amenable number.

664349253 is a deficient number, since it is larger than the sum of its proper divisors (222360315).

664349253 is a wasteful number, since it uses less digits than its factorization.

664349253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227643.

The product of its digits is 466560, while the sum is 42.

The square root of 664349253 is about 25774.9733850493. The cubic root of 664349253 is about 872.5670659416.

The spelling of 664349253 in words is "six hundred sixty-four million, three hundred forty-nine thousand, two hundred fifty-three".