663733253 has 16 divisors (see below), whose sum is σ = 687009600. Its totient is φ = 640970880.

The previous prime is 663733249. The next prime is 663733271. The reversal of 663733253 is 352337366.

It is not a de Polignac number, because 663733253 - 2² = 663733249 is a prime.

It is a super-2 number, since 2×663733253² = 881083662275924018, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663733223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 971450 + ... + 972132.

It is an arithmetic number, because the mean of its divisors is an integer number (42938100).

Almost surely, 2^663733253 is an apocalyptic number.

It is an amenable number.

663733253 is a deficient number, since it is larger than the sum of its proper divisors (23276347).

663733253 is a wasteful number, since it uses less digits than its factorization.

663733253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012.

The product of its digits is 204120, while the sum is 38.

The square root of 663733253 is about 25763.0210379140. The cubic root of 663733253 is about 872.2972944202.

The spelling of 663733253 in words is "six hundred sixty-three million, seven hundred thirty-three thousand, two hundred fifty-three".