266503791664 has 40 divisors (see below), whose sum is σ = 565751981520. Its totient is φ = 120609081600.

The previous prime is 266503791629. The next prime is 266503791677. The reversal of 266503791664 is 466197305662.

It is a happy 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 7 ways as a sum of consecutive naturals, for example, 3265867 + ... + 3346474.

It is an arithmetic number, because the mean of its divisors is an integer number (14143799538).

Almost surely, 2^266503791664 is an apocalyptic number.

It is an amenable number.

266503791664 is an abundant number, since it is smaller than the sum of its proper divisors (299248189856).

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

266503791664 is a wasteful number, since it uses less digits than its factorization.

266503791664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6612589 (or 6612583 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 55.

The spelling of 266503791664 in words is "two hundred sixty-six billion, five hundred three million, seven hundred ninety-one thousand, six hundred sixty-four".