1668808852 has 6 divisors (see below), whose sum is σ = 2920415498. Its totient is φ = 834404424.

The previous prime is 1668808847. The next prime is 1668808879. The reversal of 1668808852 is 2588088661.

It can be written as a sum of positive squares in only one way, i.e., 1198959876 + 469848976 = 34626^2 + 21676^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1668808852.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208601103 + ... + 208601110.

Almost surely, 2^1668808852 is an apocalyptic number.

It is an amenable number.

1668808852 is a deficient number, since it is larger than the sum of its proper divisors (1251606646).

1668808852 is a wasteful number, since it uses less digits than its factorization.

1668808852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417202217 (or 417202215 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 52.

The square root of 1668808852 is about 40851.0569263514. The cubic root of 1668808852 is about 1186.1388523308.

The spelling of 1668808852 in words is "one billion, six hundred sixty-eight million, eight hundred eight thousand, eight hundred fifty-two".