266148691 has 2 divisors, whose sum is σ = 266148692. Its totient is φ = 266148690.

The previous prime is 266148661. The next prime is 266148703. The reversal of 266148691 is 196841662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 266148691 - 2¹⁵ = 266115923 is a prime.

It is not a weakly prime, because it can be changed into another prime (266148611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133074345 + 133074346.

It is an arithmetic number, because the mean of its divisors is an integer number (133074346).

Almost surely, 2^266148691 is an apocalyptic number.

266148691 is a deficient number, since it is larger than the sum of its proper divisors (1).

266148691 is an equidigital number, since it uses as much as digits as its factorization.

266148691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 43.

The square root of 266148691 is about 16314.0642085288. The cubic root of 266148691 is about 643.2425696062.

The spelling of 266148691 in words is "two hundred sixty-six million, one hundred forty-eight thousand, six hundred ninety-one".