266409664 has 28 divisors (see below), whose sum is σ = 530498304. Its totient is φ = 132740864.

The previous prime is 266409607. The next prime is 266409683. The reversal of 266409664 is 466904662.

It is a self number, because there is not a number n which added to its sum of digits gives 266409664.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11649 + ... + 25855.

It is an arithmetic number, because the mean of its divisors is an integer number (18946368).

Almost surely, 2^266409664 is an apocalyptic number.

It is an amenable number.

266409664 is a deficient number, since it is larger than the sum of its proper divisors (264088640).

266409664 is a wasteful number, since it uses less digits than its factorization.

266409664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14512 (or 14502 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 43.

The square root of 266409664 is about 16322.0606542189. The cubic root of 266409664 is about 643.4527454847.

The spelling of 266409664 in words is "two hundred sixty-six million, four hundred nine thousand, six hundred sixty-four".