266009971 has 2 divisors, whose sum is σ = 266009972. Its totient is φ = 266009970.

The previous prime is 266009957. The next prime is 266010001. The reversal of 266009971 is 179900662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 266009971 - 2¹³ = 266001779 is a prime.

It is a super-2 number, since 2×266009971² = 141522609342841682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (266009921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133004985 + 133004986.

It is an arithmetic number, because the mean of its divisors is an integer number (133004986).

Almost surely, 2^266009971 is an apocalyptic number.

266009971 is a deficient number, since it is larger than the sum of its proper divisors (1).

266009971 is an equidigital number, since it uses as much as digits as its factorization.

266009971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 266009971 is about 16309.8121080532. The cubic root of 266009971 is about 643.1307948484.

The spelling of 266009971 in words is "two hundred sixty-six million, nine thousand, nine hundred seventy-one".