33660218961 has 12 divisors (see below), whose sum is σ = 49305110400. Its totient is φ = 22124087160.

The previous prime is 33660218951. The next prime is 33660219007. The reversal of 33660218961 is 16981206633.

33660218961 is a `hidden beast` number, since 3 + 36 + 602 + 1 + 8 + 9 + 6 + 1 = 666.

It is not a de Polignac number, because 33660218961 - 2¹⁰ = 33660217937 is a prime.

It is a super-2 number, since 2×33660218961² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33660218941) 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 11 ways as a sum of consecutive naturals, for example, 26337561 + ... + 26338838.

It is an arithmetic number, because the mean of its divisors is an integer number (4108759200).

Almost surely, 2^33660218961 is an apocalyptic number.

It is an amenable number.

33660218961 is a deficient number, since it is larger than the sum of its proper divisors (15644891439).

33660218961 is a wasteful number, since it uses less digits than its factorization.

33660218961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52676476 (or 52676473 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The spelling of 33660218961 in words is "thirty-three billion, six hundred sixty million, two hundred eighteen thousand, nine hundred sixty-one".