664284253 has 4 divisors (see below), whose sum is σ = 679732768. Its totient is φ = 648835740.

The previous prime is 664284241. The next prime is 664284277. The reversal of 664284253 is 352482466.

664284253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 664284253 - 2⁵ = 664284221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664284223) 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, 7724193 + ... + 7724278.

It is an arithmetic number, because the mean of its divisors is an integer number (169933192).

Almost surely, 2^664284253 is an apocalyptic number.

It is an amenable number.

664284253 is a deficient number, since it is larger than the sum of its proper divisors (15448515).

664284253 is a wasteful number, since it uses less digits than its factorization.

664284253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15448514.

The product of its digits is 276480, while the sum is 40.

The square root of 664284253 is about 25773.7124411676. The cubic root of 664284253 is about 872.5386076626.

The spelling of 664284253 in words is "six hundred sixty-four million, two hundred eighty-four thousand, two hundred fifty-three".