221686532676 has 72 divisors (see below), whose sum is σ = 643299797504. Its totient is φ = 63054961920.

The previous prime is 221686532609. The next prime is 221686532687. The reversal of 221686532676 is 676235686122.

221686532676 is a `hidden beast` number, since 2 + 21 + 6 + 86 + 532 + 6 + 7 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1916245 + ... + 2028636.

Almost surely, 2^221686532676 is an apocalyptic number.

It is an amenable number.

221686532676 is an abundant number, since it is smaller than the sum of its proper divisors (421613264828).

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

221686532676 is a wasteful number, since it uses less digits than its factorization.

221686532676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3945121 (or 3945116 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 54.

The spelling of 221686532676 in words is "two hundred twenty-one billion, six hundred eighty-six million, five hundred thirty-two thousand, six hundred seventy-six".