266868153783 has 48 divisors (see below), whose sum is σ = 480827273472. Its totient is φ = 138565440000.

The previous prime is 266868153779. The next prime is 266868153803. The reversal of 266868153783 is 387351868662.

It is a happy number.

It is not a de Polignac number, because 266868153783 - 2² = 266868153779 is a prime.

It is a super-2 number, since 2×266868153783² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 266868153783.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266868153733) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1349608 + ... + 1534658.

It is an arithmetic number, because the mean of its divisors is an integer number (10017234864).

Almost surely, 2^266868153783 is an apocalyptic number.

266868153783 is a deficient number, since it is larger than the sum of its proper divisors (213959119689).

266868153783 is a wasteful number, since it uses less digits than its factorization.

266868153783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187156 (or 187153 counting only the distinct ones).

The product of its digits is 69672960, while the sum is 63.

The spelling of 266868153783 in words is "two hundred sixty-six billion, eight hundred sixty-eight million, one hundred fifty-three thousand, seven hundred eighty-three".