266661339 has 8 divisors (see below), whose sum is σ = 406341120. Its totient is φ = 152377896.

The previous prime is 266661323. The next prime is 266661341. The reversal of 266661339 is 933166662.

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

It is not a de Polignac number, because 266661339 - 2⁴ = 266661323 is a prime.

It is a super-2 number, since 2×266661339² = 142216539434545842, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 266661339.

It is not an unprimeable number, because it can be changed into a prime (266661539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6349059 + ... + 6349100.

It is an arithmetic number, because the mean of its divisors is an integer number (50792640).

Almost surely, 2^266661339 is an apocalyptic number.

266661339 is a deficient number, since it is larger than the sum of its proper divisors (139679781).

266661339 is a wasteful number, since it uses less digits than its factorization.

266661339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12698169.

The product of its digits is 209952, while the sum is 42.

The square root of 266661339 is about 16329.7684919291. The cubic root of 266661339 is about 643.6553032039.

The spelling of 266661339 in words is "two hundred sixty-six million, six hundred sixty-one thousand, three hundred thirty-nine".