15663896066 has 16 divisors (see below), whose sum is σ = 28917962304. Its totient is φ = 6196706064.

The previous prime is 15663896051. The next prime is 15663896069. The reversal of 15663896066 is 66069836651.

It is not an unprimeable number, because it can be changed into a prime (15663896069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43032500 + ... + 43032863.

It is an arithmetic number, because the mean of its divisors is an integer number (1807372644).

Almost surely, 2^15663896066 is an apocalyptic number.

15663896066 is a deficient number, since it is larger than the sum of its proper divisors (13254066238).

15663896066 is a wasteful number, since it uses less digits than its factorization.

15663896066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86065385.

The product of its (nonzero) digits is 8398080, while the sum is 56.

The spelling of 15663896066 in words is "fifteen billion, six hundred sixty-three million, eight hundred ninety-six thousand, sixty-six".