266400207 has 12 divisors (see below), whose sum is σ = 392061384. Its totient is φ = 174248880.

The previous prime is 266400193. The next prime is 266400209. The reversal of 266400207 is 702004662.

It is not a de Polignac number, because 266400207 - 2⁸ = 266399951 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266400209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 278769 + ... + 279722.

It is an arithmetic number, because the mean of its divisors is an integer number (32671782).

Almost surely, 2^266400207 is an apocalyptic number.

266400207 is a deficient number, since it is larger than the sum of its proper divisors (125661177).

266400207 is a wasteful number, since it uses less digits than its factorization.

266400207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558550 (or 558547 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 266400207 is about 16321.7709517074. The cubic root of 266400207 is about 643.4451316410.

Adding to 266400207 its reverse (702004662), we get a palindrome (968404869).

The spelling of 266400207 in words is "two hundred sixty-six million, four hundred thousand, two hundred seven".