1686886672 has 20 divisors (see below), whose sum is σ = 3298891536. Its totient is φ = 835559840.

The previous prime is 1686886661. The next prime is 1686886753. The reversal of 1686886672 is 2766886861.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 490954 + ... + 494377.

Almost surely, 2^1686886672 is an apocalyptic number.

It is an amenable number.

1686886672 is a deficient number, since it is larger than the sum of its proper divisors (1612004864).

1686886672 is a wasteful number, since it uses less digits than its factorization.

1686886672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985446 (or 985440 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 58.

The square root of 1686886672 is about 41071.7259437682. The cubic root of 1686886672 is about 1190.4065348297.

The spelling of 1686886672 in words is "one billion, six hundred eighty-six million, eight hundred eighty-six thousand, six hundred seventy-two".