216676470067664 has 10 divisors (see below), whose sum is σ = 419810660756130. Its totient is φ = 108338235033824.

The previous prime is 216676470067649. The next prime is 216676470067721. The reversal of 216676470067664 is 466760074676612.

It can be written as a sum of positive squares in only one way, i.e., 143359721317264 + 73316748750400 = 11973292^2 + 8562520^2 .

It is a junction number, because it is equal to n+sod(n) for n = 216676470067594 and 216676470067603.

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 as a sum of consecutive naturals, namely, 6771139689599 + ... + 6771139689630.

It is an arithmetic number, because the mean of its divisors is an integer number (41981066075613).

Almost surely, 2^{216676470067664} is an apocalyptic number.

It is an amenable number.

216676470067664 is a deficient number, since it is larger than the sum of its proper divisors (203134190688466).

216676470067664 is a wasteful number, since it uses less digits than its factorization.

216676470067664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13542279379237 (or 13542279379231 counting only the distinct ones).

The product of its (nonzero) digits is 512096256, while the sum is 68.

The spelling of 216676470067664 in words is "two hundred sixteen trillion, six hundred seventy-six billion, four hundred seventy million, sixty-seven thousand, six hundred sixty-four".