266968656 has 40 divisors (see below), whose sum is σ = 766300160. Its totient is φ = 88989408.

The previous prime is 266968643. The next prime is 266968661. The reversal of 266968656 is 656869662.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308560 + ... + 309423.

It is an arithmetic number, because the mean of its divisors is an integer number (19157504).

Almost surely, 2^266968656 is an apocalyptic number.

It is an amenable number.

266968656 is an abundant number, since it is smaller than the sum of its proper divisors (499331504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

266968656 is a wasteful number, since it uses less digits than its factorization.

266968656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618000 (or 617988 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 54.

The square root of 266968656 is about 16339.1754993941. The cubic root of 266968656 is about 643.9024709887.

The spelling of 266968656 in words is "two hundred sixty-six million, nine hundred sixty-eight thousand, six hundred fifty-six".