266622997 has 2 divisors, whose sum is σ = 266622998. Its totient is φ = 266622996.

The previous prime is 266622977. The next prime is 266623001. The reversal of 266622997 is 799226662.

It is a happy number.

266622997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 264192516 + 2430481 = 16254^2 + 1559^2 .

It is a cyclic number.

It is not a de Polignac number, because 266622997 - 2²⁷ = 132405269 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 266622997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266622977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133311498 + 133311499.

It is an arithmetic number, because the mean of its divisors is an integer number (133311499).

Almost surely, 2^266622997 is an apocalyptic number.

It is an amenable number.

266622997 is a deficient number, since it is larger than the sum of its proper divisors (1).

266622997 is an equidigital number, since it uses as much as digits as its factorization.

266622997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 49.

The square root of 266622997 is about 16328.5944588014. The cubic root of 266622997 is about 643.6244523193.

The spelling of 266622997 in words is "two hundred sixty-six million, six hundred twenty-two thousand, nine hundred ninety-seven".