133666758856 has 16 divisors (see below), whose sum is σ = 253106611740. Its totient is φ = 66171662400.

The previous prime is 133666758847. The next prime is 133666758859. The reversal of 133666758856 is 658857666331.

It can be written as a sum of positive squares in 2 ways, for example, as 105151032900 + 28515725956 = 324270^2 + 168866^2 .

It is not an unprimeable number, because it can be changed into a prime (133666758859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82713771 + ... + 82715386.

Almost surely, 2^133666758856 is an apocalyptic number.

It is an amenable number.

133666758856 is a deficient number, since it is larger than the sum of its proper divisors (119439852884).

133666758856 is a wasteful number, since it uses less digits than its factorization.

133666758856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165429264 (or 165429260 counting only the distinct ones).

The product of its digits is 130636800, while the sum is 64.

The spelling of 133666758856 in words is "one hundred thirty-three billion, six hundred sixty-six million, seven hundred fifty-eight thousand, eight hundred fifty-six".