133716817666 has 16 divisors (see below), whose sum is σ = 205033439520. Its totient is φ = 65386696320.

The previous prime is 133716817649. The next prime is 133716817667. The reversal of 133716817666 is 666718617331.

It is not an unprimeable number, because it can be changed into a prime (133716817667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3570895 + ... + 3608146.

It is an arithmetic number, because the mean of its divisors is an integer number (12814589970).

Almost surely, 2^133716817666 is an apocalyptic number.

133716817666 is a deficient number, since it is larger than the sum of its proper divisors (71316621854).

133716817666 is a wasteful number, since it uses less digits than its factorization.

133716817666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7179249.

The product of its digits is 4572288, while the sum is 55.

The spelling of 133716817666 in words is "one hundred thirty-three billion, seven hundred sixteen million, eight hundred seventeen thousand, six hundred sixty-six".