1668343995 has 12 divisors (see below), whose sum is σ = 2891796336. Its totient is φ = 889783440.

The previous prime is 1668343969. The next prime is 1668344047. The reversal of 1668343995 is 5993438661.

It is not a de Polignac number, because 1668343995 - 2¹⁰ = 1668342971 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 18537111 + ... + 18537200.

It is an arithmetic number, because the mean of its divisors is an integer number (240983028).

Almost surely, 2^1668343995 is an apocalyptic number.

1668343995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1668343995 is a deficient number, since it is larger than the sum of its proper divisors (1223452341).

1668343995 is a wasteful number, since it uses less digits than its factorization.

1668343995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37074322 (or 37074319 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 54.

The square root of 1668343995 is about 40845.3668731228. The cubic root of 1668343995 is about 1186.0287066715.

The spelling of 1668343995 in words is "one billion, six hundred sixty-eight million, three hundred forty-three thousand, nine hundred ninety-five".