266722726 has 4 divisors (see below), whose sum is σ = 400084092. Its totient is φ = 133361362.

The previous prime is 266722717. The next prime is 266722763. The reversal of 266722726 is 627227662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 627227662 = 2 ⋅313613831.

It is a super-2 number, since 2×266722726² = 142282025129742152, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66680680 + ... + 66680683.

It is an arithmetic number, because the mean of its divisors is an integer number (100021023).

Almost surely, 2^266722726 is an apocalyptic number.

266722726 is a deficient number, since it is larger than the sum of its proper divisors (133361366).

266722726 is a wasteful number, since it uses less digits than its factorization.

266722726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133361365.

The product of its digits is 169344, while the sum is 40.

The square root of 266722726 is about 16331.6479878792. The cubic root of 266722726 is about 643.7046904862.

The spelling of 266722726 in words is "two hundred sixty-six million, seven hundred twenty-two thousand, seven hundred twenty-six".