266211745499952 has 160 divisors (see below), whose sum is σ = 873293791810560. Its totient is φ = 76059925240320.

The previous prime is 266211745499939. The next prime is 266211745499957. The reversal of 266211745499952 is 259994547112662.

266211745499952 is a `hidden beast` number, since 2 + 6 + 6 + 2 + 1 + 1 + 7 + 45 + 499 + 95 + 2 = 666.

It is a Smith number, since the sum of its digits (72) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (266211745499957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 553729308 + ... + 554209860.

It is an arithmetic number, because the mean of its divisors is an integer number (5458086198816).

Almost surely, 2^{266211745499952} is an apocalyptic number.

It is an amenable number.

266211745499952 is an abundant number, since it is smaller than the sum of its proper divisors (607082046310608).

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

266211745499952 is a wasteful number, since it uses less digits than its factorization.

266211745499952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663768 (or 663756 counting only the distinct ones).

The product of its digits is 587865600, while the sum is 72.

The spelling of 266211745499952 in words is "two hundred sixty-six trillion, two hundred eleven billion, seven hundred forty-five million, four hundred ninety-nine thousand, nine hundred fifty-two".