266913925253 has 4 divisors (see below), whose sum is σ = 276117853740. Its totient is φ = 257709996768.

The previous prime is 266913925249. The next prime is 266913925321. The reversal of 266913925253 is 352529319662.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 171626261284 + 95287663969 = 414278^2 + 308687^2 .

It is a cyclic number.

It is not a de Polignac number, because 266913925253 - 2² = 266913925249 is a prime.

It is a super-2 number, since 2×266913925253² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 266913925195 and 266913925204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266913925753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4601964200 + ... + 4601964257.

It is an arithmetic number, because the mean of its divisors is an integer number (69029463435).

Almost surely, 2^266913925253 is an apocalyptic number.

It is an amenable number.

266913925253 is a deficient number, since it is larger than the sum of its proper divisors (9203928487).

266913925253 is an equidigital number, since it uses as much as digits as its factorization.

266913925253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9203928486.

The product of its digits is 5248800, while the sum is 53.

The spelling of 266913925253 in words is "two hundred sixty-six billion, nine hundred thirteen million, nine hundred twenty-five thousand, two hundred fifty-three".