12004033661 has 8 divisors (see below), whose sum is σ = 12570531264. Its totient is φ = 11441251360.

The previous prime is 12004033651. The next prime is 12004033667. The reversal of 12004033661 is 16633040021.

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 12004033661 - 2¹⁰ = 12004032637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12004033661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12004033667) 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, 922211 + ... + 935136.

It is an arithmetic number, because the mean of its divisors is an integer number (1571316408).

Almost surely, 2^12004033661 is an apocalyptic number.

It is an amenable number.

12004033661 is a deficient number, since it is larger than the sum of its proper divisors (566497603).

12004033661 is a wasteful number, since it uses less digits than its factorization.

12004033661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1857651.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 12004033661 its reverse (16633040021), we get a palindrome (28637073682).

The spelling of 12004033661 in words is "twelve billion, four million, thirty-three thousand, six hundred sixty-one".