266012644600556 has 18 divisors (see below), whose sum is σ = 541525740794388. Its totient is φ = 114005419114440.

The previous prime is 266012644600531. The next prime is 266012644600603. The reversal of 266012644600556 is 655006446210662.

It is a junction number, because it is equal to n+sod(n) for n = 266012644600498 and 266012644600507.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 678603685010 + ... + 678603685401.

It is an arithmetic number, because the mean of its divisors is an integer number (30084763377466).

Almost surely, 2^{266012644600556} is an apocalyptic number.

It is an amenable number.

266012644600556 is an abundant number, since it is smaller than the sum of its proper divisors (275513096193832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

266012644600556 is a wasteful number, since it uses less digits than its factorization.

266012644600556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357207370429 (or 1357207370420 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 53.

The spelling of 266012644600556 in words is "two hundred sixty-six trillion, twelve billion, six hundred forty-four million, six hundred thousand, five hundred fifty-six".