1668956887 has 8 divisors (see below), whose sum is σ = 1835580096. Its totient is φ = 1507796832.

The previous prime is 1668956881. The next prime is 1668956953. The reversal of 1668956887 is 7886598661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1668956887 - 2¹¹ = 1668954839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668956881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1365148 + ... + 1366369.

It is an arithmetic number, because the mean of its divisors is an integer number (229447512).

Almost surely, 2^1668956887 is an apocalyptic number.

1668956887 is a deficient number, since it is larger than the sum of its proper divisors (166623209).

1668956887 is a wasteful number, since it uses less digits than its factorization.

1668956887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2731577.

The product of its digits is 34836480, while the sum is 64.

The square root of 1668956887 is about 40852.8687731963. The cubic root of 1668956887 is about 1186.1739242271.

The spelling of 1668956887 in words is "one billion, six hundred sixty-eight million, nine hundred fifty-six thousand, eight hundred eighty-seven".