1668678862 has 4 divisors (see below), whose sum is σ = 2503018296. Its totient is φ = 834339430.

The previous prime is 1668678853. The next prime is 1668678883. The reversal of 1668678862 is 2688768661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2688768661 = 5081 ⋅529181.

It is a junction number, because it is equal to n+sod(n) for n = 1668678797 and 1668678806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 417169714 + ... + 417169717.

It is an arithmetic number, because the mean of its divisors is an integer number (625754574).

Almost surely, 2^1668678862 is an apocalyptic number.

1668678862 is a deficient number, since it is larger than the sum of its proper divisors (834339434).

1668678862 is an equidigital number, since it uses as much as digits as its factorization.

1668678862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834339433.

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

The square root of 1668678862 is about 40849.4658716610. The cubic root of 1668678862 is about 1186.1080538778.

The spelling of 1668678862 in words is "one billion, six hundred sixty-eight million, six hundred seventy-eight thousand, eight hundred sixty-two".