665333763 has 16 divisors (see below), whose sum is σ = 897115296. Its totient is φ = 438566400.

The previous prime is 665333707. The next prime is 665333783. The reversal of 665333763 is 367333566.

It is not a de Polignac number, because 665333763 - 2⁶ = 665333699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (665333783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 392145 + ... + 393837.

It is an arithmetic number, because the mean of its divisors is an integer number (56069706).

Almost surely, 2^665333763 is an apocalyptic number.

665333763 is a deficient number, since it is larger than the sum of its proper divisors (231781533).

665333763 is a wasteful number, since it uses less digits than its factorization.

665333763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3094.

The product of its digits is 612360, while the sum is 42.

The square root of 665333763 is about 25794.0644916616. The cubic root of 665333763 is about 872.9978769947.

The spelling of 665333763 in words is "six hundred sixty-five million, three hundred thirty-three thousand, seven hundred sixty-three".