266120656 has 20 divisors (see below), whose sum is σ = 516966912. Its totient is φ = 132709856.

The previous prime is 266120653. The next prime is 266120677. The reversal of 266120656 is 656021662.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266120653) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 15586 + ... + 27841.

Almost surely, 2^266120656 is an apocalyptic number.

It is an amenable number.

266120656 is a deficient number, since it is larger than the sum of its proper divisors (250846256).

266120656 is a wasteful number, since it uses less digits than its factorization.

266120656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43818 (or 43812 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 266120656 is about 16313.2049579474. The cubic root of 266120656 is about 643.2199833111.

The spelling of 266120656 in words is "two hundred sixty-six million, one hundred twenty thousand, six hundred fifty-six".