133500521655666 has 48 divisors (see below), whose sum is σ = 334108257414048. Its totient is φ = 38075015088000.

The previous prime is 133500521655661. The next prime is 133500521655673. The reversal of 133500521655666 is 666556125005331.

It is not an unprimeable number, because it can be changed into a prime (133500521655661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19830733660 + ... + 19830740391.

It is an arithmetic number, because the mean of its divisors is an integer number (6960588696126).

Almost surely, 2^{133500521655666} is an apocalyptic number.

133500521655666 is an abundant number, since it is smaller than the sum of its proper divisors (200607735758382).

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

133500521655666 is a wasteful number, since it uses less digits than its factorization.

133500521655666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39661474087 (or 39661474084 counting only the distinct ones).

The product of its (nonzero) digits is 14580000, while the sum is 54.

The spelling of 133500521655666 in words is "one hundred thirty-three trillion, five hundred billion, five hundred twenty-one million, six hundred fifty-five thousand, six hundred sixty-six".