1668675831 has 8 divisors (see below), whose sum is σ = 2231205360. Its totient is φ = 1109298432.

The previous prime is 1668675809. The next prime is 1668675847. The reversal of 1668675831 is 1385768661.

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

It is not a de Polignac number, because 1668675831 - 2⁹ = 1668675319 is a prime.

It is a super-2 number, since 2×1668675831² = 5568958057927081122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668675131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 786796 + ... + 788913.

It is an arithmetic number, because the mean of its divisors is an integer number (278900670).

Almost surely, 2^1668675831 is an apocalyptic number.

1668675831 is a deficient number, since it is larger than the sum of its proper divisors (562529529).

1668675831 is a wasteful number, since it uses less digits than its factorization.

1668675831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1576065.

The product of its digits is 1451520, while the sum is 51.

The square root of 1668675831 is about 40849.4287720159. The cubic root of 1668675831 is about 1186.1073357257.

The spelling of 1668675831 in words is "one billion, six hundred sixty-eight million, six hundred seventy-five thousand, eight hundred thirty-one".