266420971 has 2 divisors, whose sum is σ = 266420972. Its totient is φ = 266420970.

The previous prime is 266420969. The next prime is 266421041. The reversal of 266420971 is 179024662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 266420971 - 2¹ = 266420969 is a prime.

Together with 266420969, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 266420971.

It is not a weakly prime, because it can be changed into another prime (266420951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133210485 + 133210486.

It is an arithmetic number, because the mean of its divisors is an integer number (133210486).

Almost surely, 2^266420971 is an apocalyptic number.

266420971 is a deficient number, since it is larger than the sum of its proper divisors (1).

266420971 is an equidigital number, since it uses as much as digits as its factorization.

266420971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 266420971 is about 16322.4070222501. The cubic root of 266420971 is about 643.4618485294.

The spelling of 266420971 in words is "two hundred sixty-six million, four hundred twenty thousand, nine hundred seventy-one".