266107381 has 2 divisors, whose sum is σ = 266107382. Its totient is φ = 266107380.

The previous prime is 266107351. The next prime is 266107397. The reversal of 266107381 is 183701662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 253892356 + 12215025 = 15934^2 + 3495^2 .

It is a cyclic number.

It is not a de Polignac number, because 266107381 - 2⁷ = 266107253 is a prime.

It is a super-2 number, since 2×266107381² = 141626276445358322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266107301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133053690 + 133053691.

It is an arithmetic number, because the mean of its divisors is an integer number (133053691).

Almost surely, 2^266107381 is an apocalyptic number.

It is an amenable number.

266107381 is a deficient number, since it is larger than the sum of its proper divisors (1).

266107381 is an equidigital number, since it uses as much as digits as its factorization.

266107381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 266107381 is about 16312.7980739050. The cubic root of 266107381 is about 643.2092878025.

The spelling of 266107381 in words is "two hundred sixty-six million, one hundred seven thousand, three hundred eighty-one".