266750401 has 2 divisors, whose sum is σ = 266750402. Its totient is φ = 266750400.

The previous prime is 266750369. The next prime is 266750441. The reversal of 266750401 is 104057662.

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., 223203600 + 43546801 = 14940^2 + 6599^2 .

It is a cyclic number.

It is not a de Polignac number, because 266750401 - 2⁵ = 266750369 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (266750441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133375200 + 133375201.

It is an arithmetic number, because the mean of its divisors is an integer number (133375201).

Almost surely, 2^266750401 is an apocalyptic number.

It is an amenable number.

266750401 is a deficient number, since it is larger than the sum of its proper divisors (1).

266750401 is an equidigital number, since it uses as much as digits as its factorization.

266750401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 266750401 is about 16332.4952472058. The cubic root of 266750401 is about 643.7269531951.

The spelling of 266750401 in words is "two hundred sixty-six million, seven hundred fifty thousand, four hundred one".