4006406520663 has 16 divisors (see below), whose sum is σ = 5457673036800. Its totient is φ = 2613083441696.

The previous prime is 4006406520647. The next prime is 4006406520751. The reversal of 4006406520663 is 3660256046004.

It is a cyclic number.

It is not a de Polignac number, because 4006406520663 - 2⁴ = 4006406520647 is a prime.

It is a super-2 number, since 2×4006406520663² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4006406520863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5214195 + ... + 5933012.

It is an arithmetic number, because the mean of its divisors is an integer number (341104564800).

Almost surely, 2^{4006406520663} is an apocalyptic number.

4006406520663 is a deficient number, since it is larger than the sum of its proper divisors (1451266516137).

4006406520663 is a wasteful number, since it uses less digits than its factorization.

4006406520663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11149806.

The product of its (nonzero) digits is 622080, while the sum is 42.

The spelling of 4006406520663 in words is "four trillion, six billion, four hundred six million, five hundred twenty thousand, six hundred sixty-three".