663665133 has 4 divisors (see below), whose sum is σ = 884886848. Its totient is φ = 442443420.

The previous prime is 663665113. The next prime is 663665137. The reversal of 663665133 is 331566366.

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 not a de Polignac number, because 663665133 - 2⁹ = 663664621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 663665091 and 663665100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663665137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110610853 + ... + 110610858.

It is an arithmetic number, because the mean of its divisors is an integer number (221221712).

Almost surely, 2^663665133 is an apocalyptic number.

It is an amenable number.

663665133 is a deficient number, since it is larger than the sum of its proper divisors (221221715).

663665133 is a wasteful number, since it uses less digits than its factorization.

663665133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221221714.

The product of its digits is 174960, while the sum is 39.

The square root of 663665133 is about 25761.6989540675. The cubic root of 663665133 is about 872.2674516461.

The spelling of 663665133 in words is "six hundred sixty-three million, six hundred sixty-five thousand, one hundred thirty-three".