1206666216564 has 24 divisors (see below), whose sum is σ = 2815801954560. Its totient is φ = 402186722304.

The previous prime is 1206666216551. The next prime is 1206666216593. The reversal of 1206666216564 is 4656126666021.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4276324 + ... + 4549755.

It is an arithmetic number, because the mean of its divisors is an integer number (117325081440).

Almost surely, 2^{1206666216564} is an apocalyptic number.

It is an amenable number.

1206666216564 is an abundant number, since it is smaller than the sum of its proper divisors (1609135737996).

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

1206666216564 is a wasteful number, since it uses less digits than its factorization.

1206666216564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8837479 (or 8837477 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 51.

The spelling of 1206666216564 in words is "one trillion, two hundred six billion, six hundred sixty-six million, two hundred sixteen thousand, five hundred sixty-four".