866475533471216 has 10 divisors (see below), whose sum is σ = 1678796346100512. Its totient is φ = 433237766735600.

The previous prime is 866475533471203. The next prime is 866475533471231. The reversal of 866475533471216 is 612174335574668.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27077360420960 + ... + 27077360420991.

Almost surely, 2^{866475533471216} is an apocalyptic number.

It is an amenable number.

866475533471216 is a deficient number, since it is larger than the sum of its proper divisors (812320812629296).

866475533471216 is a wasteful number, since it uses less digits than its factorization.

866475533471216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54154720841959 (or 54154720841953 counting only the distinct ones).

The product of its digits is 609638400, while the sum is 68.

The spelling of 866475533471216 in words is "eight hundred sixty-six trillion, four hundred seventy-five billion, five hundred thirty-three million, four hundred seventy-one thousand, two hundred sixteen".