266347139556 has 24 divisors (see below), whose sum is σ = 621507678624. Its totient is φ = 88777948480.

The previous prime is 266347139537. The next prime is 266347139623. The reversal of 266347139556 is 655931743662.

It is a junction number, because it is equal to n+sod(n) for n = 266347139496 and 266347139505.

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, 298785 + ... + 788648.

It is an arithmetic number, because the mean of its divisors is an integer number (25896153276).

Almost surely, 2^266347139556 is an apocalyptic number.

It is an amenable number.

266347139556 is an abundant number, since it is smaller than the sum of its proper divisors (355160539068).

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

266347139556 is a wasteful number, since it uses less digits than its factorization.

266347139556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107851 (or 1107849 counting only the distinct ones).

The product of its digits is 24494400, while the sum is 57.

The spelling of 266347139556 in words is "two hundred sixty-six billion, three hundred forty-seven million, one hundred thirty-nine thousand, five hundred fifty-six".