264220666 has 8 divisors (see below), whose sum is σ = 399224340. Its totient is φ = 131145888.

The previous prime is 264220639. The next prime is 264220679. The reversal of 264220666 is 666022462.

It can be written as a sum of positive squares in 2 ways, for example, as 244015641 + 20205025 = 15621^2 + 4495^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 481881 + ... + 482428.

Almost surely, 2^264220666 is an apocalyptic number.

264220666 is a deficient number, since it is larger than the sum of its proper divisors (135003674).

264220666 is a wasteful number, since it uses less digits than its factorization.

264220666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964448.

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 264220666 is about 16254.8659176260. The cubic root of 264220666 is about 641.6855520238.

The spelling of 264220666 in words is "two hundred sixty-four million, two hundred twenty thousand, six hundred sixty-six".