264666217 has 16 divisors (see below), whose sum is σ = 289446912. Its totient is φ = 240986880.

The previous prime is 264666211. The next prime is 264666223. The reversal of 264666217 is 712666462.

It is an interprime number because it is at equal distance from previous prime (264666211) and next prime (264666223).

It is a cyclic number.

It is not a de Polignac number, because 264666217 - 2¹⁹ = 264141929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 264666217.

It is not an unprimeable number, because it can be changed into a prime (264666211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119038 + ... + 121240.

It is an arithmetic number, because the mean of its divisors is an integer number (18090432).

Almost surely, 2^264666217 is an apocalyptic number.

It is an amenable number.

264666217 is a deficient number, since it is larger than the sum of its proper divisors (24780695).

264666217 is a wasteful number, since it uses less digits than its factorization.

264666217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2448.

The product of its digits is 145152, while the sum is 40.

The square root of 264666217 is about 16268.5653024475. The cubic root of 264666217 is about 642.0460374332.

The spelling of 264666217 in words is "two hundred sixty-four million, six hundred sixty-six thousand, two hundred seventeen".