266656550 has 12 divisors (see below), whose sum is σ = 495981276. Its totient is φ = 106662600.

The previous prime is 266656547. The next prime is 266656561. The reversal of 266656550 is 55656662.

It is a super-2 number, since 2×266656550² = 142211431315805000, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 266656498 and 266656507.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2666516 + ... + 2666615.

It is an arithmetic number, because the mean of its divisors is an integer number (41331773).

Almost surely, 2^266656550 is an apocalyptic number.

266656550 is a deficient number, since it is larger than the sum of its proper divisors (229324726).

266656550 is a wasteful number, since it uses less digits than its factorization.

266656550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5333143 (or 5333138 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 41.

The square root of 266656550 is about 16329.6218572262. The cubic root of 266656550 is about 643.6514500223.

The spelling of 266656550 in words is "two hundred sixty-six million, six hundred fifty-six thousand, five hundred fifty".