266680953881 has 2 divisors, whose sum is σ = 266680953882. Its totient is φ = 266680953880.

The previous prime is 266680953797. The next prime is 266680953899. The reversal of 266680953881 is 188359086662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156313483225 + 110367470656 = 395365^2 + 332216^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266680953881 is a prime.

It is a super-2 number, since 2×266680953881² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (266680953481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133340476940 + 133340476941.

It is an arithmetic number, because the mean of its divisors is an integer number (133340476941).

Almost surely, 2^266680953881 is an apocalyptic number.

It is an amenable number.

266680953881 is a deficient number, since it is larger than the sum of its proper divisors (1).

266680953881 is an equidigital number, since it uses as much as digits as its factorization.

266680953881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29859840, while the sum is 62.

The spelling of 266680953881 in words is "two hundred sixty-six billion, six hundred eighty million, nine hundred fifty-three thousand, eight hundred eighty-one".