12566206616 has 8 divisors (see below), whose sum is σ = 23561637420. Its totient is φ = 6283103304.

The previous prime is 12566206603. The next prime is 12566206651. The reversal of 12566206616 is 61660266521.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 785387906 + ... + 785387921.

Almost surely, 2^12566206616 is an apocalyptic number.

It is an amenable number.

12566206616 is a deficient number, since it is larger than the sum of its proper divisors (10995430804).

12566206616 is a wasteful number, since it uses less digits than its factorization.

12566206616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1570775833 (or 1570775829 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 12566206616 in words is "twelve billion, five hundred sixty-six million, two hundred six thousand, six hundred sixteen".