266400799933 has 2 divisors, whose sum is σ = 266400799934. Its totient is φ = 266400799932.

The previous prime is 266400799919. The next prime is 266400799937. The reversal of 266400799933 is 339997004662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 173373969924 + 93026830009 = 416382^2 + 305003^2 .

It is a cyclic number.

It is not a de Polignac number, because 266400799933 - 2³³ = 257810865341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266400799937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133200399966 + 133200399967.

It is an arithmetic number, because the mean of its divisors is an integer number (133200399967).

Almost surely, 2^266400799933 is an apocalyptic number.

It is an amenable number.

266400799933 is a deficient number, since it is larger than the sum of its proper divisors (1).

266400799933 is an equidigital number, since it uses as much as digits as its factorization.

266400799933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13226976, while the sum is 58.

The spelling of 266400799933 in words is "two hundred sixty-six billion, four hundred million, seven hundred ninety-nine thousand, nine hundred thirty-three".