217100483748666 has 80 divisors (see below), whose sum is σ = 588664617051456. Its totient is φ = 58379962011264.

The previous prime is 217100483748611. The next prime is 217100483748677. The reversal of 217100483748666 is 666847384001712.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5630764096 + ... + 5630802651.

Almost surely, 2^{217100483748666} is an apocalyptic number.

217100483748666 is an abundant number, since it is smaller than the sum of its proper divisors (371564133302790).

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

217100483748666 is a wasteful number, since it uses less digits than its factorization.

217100483748666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11261566785 (or 11261566776 counting only the distinct ones).

The product of its (nonzero) digits is 65028096, while the sum is 63.

The spelling of 217100483748666 in words is "two hundred seventeen trillion, one hundred billion, four hundred eighty-three million, seven hundred forty-eight thousand, six hundred sixty-six".