266872387 has 2 divisors, whose sum is σ = 266872388. Its totient is φ = 266872386.

The previous prime is 266872369. The next prime is 266872393. The reversal of 266872387 is 783278662.

266872387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 266872387 - 2¹⁵ = 266839619 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 266872387.

It is not a weakly prime, because it can be changed into another prime (266872357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133436193 + 133436194.

It is an arithmetic number, because the mean of its divisors is an integer number (133436194).

Almost surely, 2^266872387 is an apocalyptic number.

266872387 is a deficient number, since it is larger than the sum of its proper divisors (1).

266872387 is an equidigital number, since it uses as much as digits as its factorization.

266872387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1354752, while the sum is 49.

The square root of 266872387 is about 16336.2292772843. The cubic root of 266872387 is about 643.8250645242.

The spelling of 266872387 in words is "two hundred sixty-six million, eight hundred seventy-two thousand, three hundred eighty-seven".