1668516835 has 32 divisors (see below), whose sum is σ = 2081777472. Its totient is φ = 1283143680.

The previous prime is 1668516821. The next prime is 1668516841. The reversal of 1668516835 is 5386158661.

It is not a de Polignac number, because 1668516835 - 2¹³ = 1668508643 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3050032 + ... + 3050578.

It is an arithmetic number, because the mean of its divisors is an integer number (65055546).

Almost surely, 2^1668516835 is an apocalyptic number.

1668516835 is a deficient number, since it is larger than the sum of its proper divisors (413260637).

1668516835 is a wasteful number, since it uses less digits than its factorization.

1668516835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823.

The product of its digits is 1036800, while the sum is 49.

The square root of 1668516835 is about 40847.4826029708. The cubic root of 1668516835 is about 1186.0696626781.

The spelling of 1668516835 in words is "one billion, six hundred sixty-eight million, five hundred sixteen thousand, eight hundred thirty-five".