266939620823 has 8 divisors (see below), whose sum is σ = 269417264160. Its totient is φ = 264462498720.

The previous prime is 266939620811. The next prime is 266939620867. The reversal of 266939620823 is 328026939662.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 266939620823 - 2³⁴ = 249759751639 is a prime.

It is a super-2 number, since 2×266939620823² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266939622823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 939233 + ... + 1189973.

It is an arithmetic number, because the mean of its divisors is an integer number (33677158020).

Almost surely, 2^266939620823 is an apocalyptic number.

266939620823 is a deficient number, since it is larger than the sum of its proper divisors (2477643337).

266939620823 is a wasteful number, since it uses less digits than its factorization.

266939620823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260617.

The product of its (nonzero) digits is 10077696, while the sum is 56.

The spelling of 266939620823 in words is "two hundred sixty-six billion, nine hundred thirty-nine million, six hundred twenty thousand, eight hundred twenty-three".