1668795658 has 16 divisors (see below), whose sum is σ = 2586067200. Its totient is φ = 806817600.

The previous prime is 1668795553. The next prime is 1668795671. The reversal of 1668795658 is 8565978661.

It is a super-3 number, since 3×1668795658³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1668795596 and 1668795605.

It is an unprimeable number.

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, 69618 + ... + 90466.

It is an arithmetic number, because the mean of its divisors is an integer number (161629200).

Almost surely, 2^1668795658 is an apocalyptic number.

1668795658 is a deficient number, since it is larger than the sum of its proper divisors (917271542).

1668795658 is a wasteful number, since it uses less digits than its factorization.

1668795658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22173.

The product of its digits is 21772800, while the sum is 61.

The square root of 1668795658 is about 40850.8954369424. The cubic root of 1668795658 is about 1186.1357263572.

The spelling of 1668795658 in words is "one billion, six hundred sixty-eight million, seven hundred ninety-five thousand, six hundred fifty-eight".