1668997675 has 6 divisors (see below), whose sum is σ = 2069557148. Its totient is φ = 1335198120.

The previous prime is 1668997669. The next prime is 1668997697. The reversal of 1668997675 is 5767998661.

It is a de Polignac number, because none of the positive numbers 2^k-1668997675 is a prime.

It is a Duffinian number.

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 5 ways as a sum of consecutive naturals, for example, 33379929 + ... + 33379978.

Almost surely, 2^1668997675 is an apocalyptic number.

1668997675 is a deficient number, since it is larger than the sum of its proper divisors (400559473).

1668997675 is an equidigital number, since it uses as much as digits as its factorization.

1668997675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66759917 (or 66759912 counting only the distinct ones).

The product of its digits is 34292160, while the sum is 64.

The square root of 1668997675 is about 40853.3679762146. The cubic root of 1668997675 is about 1186.1835872025.

The spelling of 1668997675 in words is "one billion, six hundred sixty-eight million, nine hundred ninety-seven thousand, six hundred seventy-five".