663606133 has 2 divisors, whose sum is σ = 663606134. Its totient is φ = 663606132.

The previous prime is 663606131. The next prime is 663606149. The reversal of 663606133 is 331606366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 606784689 + 56821444 = 24633^2 + 7538^2 .

It is a cyclic number.

It is not a de Polignac number, because 663606133 - 2¹ = 663606131 is a prime.

Together with 663606131, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663606131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331803066 + 331803067.

It is an arithmetic number, because the mean of its divisors is an integer number (331803067).

Almost surely, 2^663606133 is an apocalyptic number.

It is an amenable number.

663606133 is a deficient number, since it is larger than the sum of its proper divisors (1).

663606133 is an equidigital number, since it uses as much as digits as its factorization.

663606133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 34.

The square root of 663606133 is about 25760.5538178045. The cubic root of 663606133 is about 872.2416026136.

The spelling of 663606133 in words is "six hundred sixty-three million, six hundred six thousand, one hundred thirty-three".