1206666216563 has 8 divisors (see below), whose sum is σ = 1218733238160. Its totient is φ = 1194601544800.

The previous prime is 1206666216551. The next prime is 1206666216593. The reversal of 1206666216563 is 3656126666021.

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 1206666216563 - 2¹² = 1206666212467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1206666216523) 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, 453881 + ... + 1618437.

It is an arithmetic number, because the mean of its divisors is an integer number (152341654770).

Almost surely, 2^{1206666216563} is an apocalyptic number.

1206666216563 is a deficient number, since it is larger than the sum of its proper divisors (12067021597).

1206666216563 is a wasteful number, since it uses less digits than its factorization.

1206666216563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1174917.

The product of its (nonzero) digits is 2799360, while the sum is 50.

The spelling of 1206666216563 in words is "one trillion, two hundred six billion, six hundred sixty-six million, two hundred sixteen thousand, five hundred sixty-three".