1668358557622 has 8 divisors (see below), whose sum is σ = 2634250354200. Its totient is φ = 790275106224.

The previous prime is 1668358557587. The next prime is 1668358557631. The reversal of 1668358557622 is 2267558538661.

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 pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21952086247 + ... + 21952086322.

It is an arithmetic number, because the mean of its divisors is an integer number (329281294275).

Almost surely, 2^{1668358557622} is an apocalyptic number.

1668358557622 is a deficient number, since it is larger than the sum of its proper divisors (965891796578).

1668358557622 is a wasteful number, since it uses less digits than its factorization.

1668358557622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43904172590.

The product of its digits is 145152000, while the sum is 64.

The spelling of 1668358557622 in words is "one trillion, six hundred sixty-eight billion, three hundred fifty-eight million, five hundred fifty-seven thousand, six hundred twenty-two".