4000664066646 has 32 divisors (see below), whose sum is σ = 8625254668128. Its totient is φ = 1229767879680.

The previous prime is 4000664066617. The next prime is 4000664066653. The reversal of 4000664066646 is 6466604660004.

4000664066646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 4000664066595 and 4000664066604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25038171 + ... + 25197446.

It is an arithmetic number, because the mean of its divisors is an integer number (269539208379).

Almost surely, 2^{4000664066646} is an apocalyptic number.

4000664066646 is an abundant number, since it is smaller than the sum of its proper divisors (4624590601482).

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

4000664066646 is a wasteful number, since it uses less digits than its factorization.

4000664066646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50236656.

The product of its (nonzero) digits is 2985984, while the sum is 48.

The spelling of 4000664066646 in words is "four trillion, six hundred sixty-four million, sixty-six thousand, six hundred forty-six".