266407946773 has 2 divisors, whose sum is σ = 266407946774. Its totient is φ = 266407946772.

The previous prime is 266407946731. The next prime is 266407946803. The reversal of 266407946773 is 377649704662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209729193444 + 56678753329 = 457962^2 + 238073^2 .

It is a cyclic number.

It is not a de Polignac number, because 266407946773 - 2²⁵ = 266374392341 is a prime.

It is a super-2 number, since 2×266407946773² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266407946173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133203973386 + 133203973387.

It is an arithmetic number, because the mean of its divisors is an integer number (133203973387).

Almost surely, 2^266407946773 is an apocalyptic number.

It is an amenable number.

266407946773 is a deficient number, since it is larger than the sum of its proper divisors (1).

266407946773 is an equidigital number, since it uses as much as digits as its factorization.

266407946773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64012032, while the sum is 61.

The spelling of 266407946773 in words is "two hundred sixty-six billion, four hundred seven million, nine hundred forty-six thousand, seven hundred seventy-three".