133664653661 has 8 divisors (see below), whose sum is σ = 166646841024. Its totient is φ = 104154275520.

The previous prime is 133664653621. The next prime is 133664653699. The reversal of 133664653661 is 166356466331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133664653661 - 2⁶ = 133664653597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133664653621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 867952220 + ... + 867952373.

It is an arithmetic number, because the mean of its divisors is an integer number (20830855128).

Almost surely, 2^133664653661 is an apocalyptic number.

133664653661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

133664653661 is a deficient number, since it is larger than the sum of its proper divisors (32982187363).

133664653661 is a wasteful number, since it uses less digits than its factorization.

133664653661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1735904611.

The product of its digits is 4199040, while the sum is 50.

The spelling of 133664653661 in words is "one hundred thirty-three billion, six hundred sixty-four million, six hundred fifty-three thousand, six hundred sixty-one".