264565663 has 4 divisors (see below), whose sum is σ = 265500808. Its totient is φ = 263630520.

The previous prime is 264565649. The next prime is 264565669. The reversal of 264565663 is 366565462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 366565462 = 2 ⋅183282731.

It is a cyclic number.

It is not a de Polignac number, because 264565663 - 2⁹ = 264565151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264565669) 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, 467148 + ... + 467713.

It is an arithmetic number, because the mean of its divisors is an integer number (66375202).

Almost surely, 2^264565663 is an apocalyptic number.

264565663 is a deficient number, since it is larger than the sum of its proper divisors (935145).

264565663 is an equidigital number, since it uses as much as digits as its factorization.

264565663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935144.

The product of its digits is 777600, while the sum is 43.

The square root of 264565663 is about 16265.4745703899. The cubic root of 264565663 is about 641.9647167975.

The spelling of 264565663 in words is "two hundred sixty-four million, five hundred sixty-five thousand, six hundred sixty-three".