266201663 has 12 divisors (see below), whose sum is σ = 333484200. Its totient is φ = 210620592.

The previous prime is 266201651. The next prime is 266201693. The reversal of 266201663 is 366102662.

It is not a de Polignac number, because 266201663 - 2⁸ = 266201407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266201603) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 208313 + ... + 209586.

It is an arithmetic number, because the mean of its divisors is an integer number (27790350).

Almost surely, 2^266201663 is an apocalyptic number.

266201663 is a deficient number, since it is larger than the sum of its proper divisors (67282537).

266201663 is a wasteful number, since it uses less digits than its factorization.

266201663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417926 (or 417919 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 266201663 is about 16315.6876349114. The cubic root of 266201663 is about 643.2852419747.

Subtracting 266201663 from its reverse (366102662), we obtain a palindrome (99900999).

The spelling of 266201663 in words is "two hundred sixty-six million, two hundred one thousand, six hundred sixty-three".