665379263 has 2 divisors, whose sum is σ = 665379264. Its totient is φ = 665379262.

The previous prime is 665379233. The next prime is 665379287. The reversal of 665379263 is 362973566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 665379263 - 2⁶ = 665379199 is a prime.

It is a super-3 number, since 3×665379263³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665379223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332689631 + 332689632.

It is an arithmetic number, because the mean of its divisors is an integer number (332689632).

Almost surely, 2^665379263 is an apocalyptic number.

665379263 is a deficient number, since it is larger than the sum of its proper divisors (1).

665379263 is an equidigital number, since it uses as much as digits as its factorization.

665379263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1224720, while the sum is 47.

The square root of 665379263 is about 25794.9464624372. The cubic root of 665379263 is about 873.0177770309.

The spelling of 665379263 in words is "six hundred sixty-five million, three hundred seventy-nine thousand, two hundred sixty-three".