266532665 has 32 divisors (see below), whose sum is σ = 386027520. Its totient is φ = 172580544.

The previous prime is 266532653. The next prime is 266532683. The reversal of 266532665 is 566235662.

It is a cyclic number.

It is not a de Polignac number, because 266532665 - 2²⁶ = 199423801 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 323444 + ... + 324266.

It is an arithmetic number, because the mean of its divisors is an integer number (12063360).

Almost surely, 2^266532665 is an apocalyptic number.

It is an amenable number.

266532665 is a deficient number, since it is larger than the sum of its proper divisors (119494855).

266532665 is a wasteful number, since it uses less digits than its factorization.

266532665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1341.

The product of its digits is 388800, while the sum is 41.

The square root of 266532665 is about 16325.8281566357. The cubic root of 266532665 is about 643.5517573507.

The spelling of 266532665 in words is "two hundred sixty-six million, five hundred thirty-two thousand, six hundred sixty-five".