266686852556 has 24 divisors (see below), whose sum is σ = 483026937120. Its totient is φ = 128683571072.

The previous prime is 266686852543. The next prime is 266686852567. The reversal of 266686852556 is 655258686662.

It is a happy number.

It is a super-2 number, since 2×266686852556² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 266686852492 and 266686852501.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308705 + ... + 792888.

It is an arithmetic number, because the mean of its divisors is an integer number (20126122380).

Almost surely, 2^266686852556 is an apocalyptic number.

It is an amenable number.

266686852556 is a deficient number, since it is larger than the sum of its proper divisors (216340084564).

266686852556 is a wasteful number, since it uses less digits than its factorization.

266686852556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1103713 (or 1103711 counting only the distinct ones).

The product of its digits is 248832000, while the sum is 65.

The spelling of 266686852556 in words is "two hundred sixty-six billion, six hundred eighty-six million, eight hundred fifty-two thousand, five hundred fifty-six".