266004265997 has 2 divisors, whose sum is σ = 266004265998. Its totient is φ = 266004265996.

The previous prime is 266004265991. The next prime is 266004266069. The reversal of 266004265997 is 799562400662.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 260456101801 + 5548164196 = 510349^2 + 74486^2 .

It is a cyclic number.

It is not a de Polignac number, because 266004265997 - 2⁸ = 266004265741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266004265991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133002132998 + 133002132999.

It is an arithmetic number, because the mean of its divisors is an integer number (133002132999).

Almost surely, 2^266004265997 is an apocalyptic number.

It is an amenable number.

266004265997 is a deficient number, since it is larger than the sum of its proper divisors (1).

266004265997 is an equidigital number, since it uses as much as digits as its factorization.

266004265997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9797760, while the sum is 56.

The spelling of 266004265997 in words is "two hundred sixty-six billion, four million, two hundred sixty-five thousand, nine hundred ninety-seven".