266470381 has 2 divisors, whose sum is σ = 266470382. Its totient is φ = 266470380.

The previous prime is 266470331. The next prime is 266470417. The reversal of 266470381 is 183074662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 229674025 + 36796356 = 15155^2 + 6066^2 .

It is a cyclic number.

It is not a de Polignac number, because 266470381 - 2⁹ = 266469869 is a prime.

It is a super-2 number, since 2×266470381² = 142012927900570322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 266470381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266470331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133235190 + 133235191.

It is an arithmetic number, because the mean of its divisors is an integer number (133235191).

Almost surely, 2^266470381 is an apocalyptic number.

It is an amenable number.

266470381 is a deficient number, since it is larger than the sum of its proper divisors (1).

266470381 is an equidigital number, since it uses as much as digits as its factorization.

266470381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 266470381 is about 16323.9205156114. The cubic root of 266470381 is about 643.5016245333.

The spelling of 266470381 in words is "two hundred sixty-six million, four hundred seventy thousand, three hundred eighty-one".