266230649 has 2 divisors, whose sum is σ = 266230650. Its totient is φ = 266230648.

The previous prime is 266230639. The next prime is 266230691. The reversal of 266230649 is 946032662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136726249 + 129504400 = 11693^2 + 11380^2 .

It is a cyclic number.

It is not a de Polignac number, because 266230649 - 2¹² = 266226553 is a prime.

It is a super-2 number, since 2×266230649² = 141757516933922402, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (266230609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133115324 + 133115325.

It is an arithmetic number, because the mean of its divisors is an integer number (133115325).

Almost surely, 2^266230649 is an apocalyptic number.

It is an amenable number.

266230649 is a deficient number, since it is larger than the sum of its proper divisors (1).

266230649 is an equidigital number, since it uses as much as digits as its factorization.

266230649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 38.

The square root of 266230649 is about 16316.5758969215. The cubic root of 266230649 is about 643.3085896742.

The spelling of 266230649 in words is "two hundred sixty-six million, two hundred thirty thousand, six hundred forty-nine".