1668851630 has 8 divisors (see below), whose sum is σ = 3003932952. Its totient is φ = 667540648.

The previous prime is 1668851627. The next prime is 1668851647. The reversal of 1668851630 is 361588661.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83442572 + ... + 83442591.

It is an arithmetic number, because the mean of its divisors is an integer number (375491619).

Almost surely, 2^1668851630 is an apocalyptic number.

1668851630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1668851630 is a deficient number, since it is larger than the sum of its proper divisors (1335081322).

1668851630 is a wasteful number, since it uses less digits than its factorization.

1668851630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166885170.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 1668851630 is about 40851.5805079803. The cubic root of 1668851630 is about 1186.1489873470.

The spelling of 1668851630 in words is "one billion, six hundred sixty-eight million, eight hundred fifty-one thousand, six hundred thirty".