1668900919 has 8 divisors (see below), whose sum is σ = 1907582240. Its totient is φ = 1430286336.

The previous prime is 1668900889. The next prime is 1668900943. The reversal of 1668900919 is 9190098661.

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

It is a cyclic number.

It is not a de Polignac number, because 1668900919 - 2⁵ = 1668900887 is a prime.

It is a super-2 number, since 2×1668900919² = 5570460554878089122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668900949) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 61087 + ... + 84079.

It is an arithmetic number, because the mean of its divisors is an integer number (238447780).

Almost surely, 2^1668900919 is an apocalyptic number.

1668900919 is a deficient number, since it is larger than the sum of its proper divisors (238681321).

1668900919 is a wasteful number, since it uses less digits than its factorization.

1668900919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33369.

The product of its (nonzero) digits is 209952, while the sum is 49.

The square root of 1668900919 is about 40852.1837727189. The cubic root of 1668900919 is about 1186.1606647425.

The spelling of 1668900919 in words is "one billion, six hundred sixty-eight million, nine hundred thousand, nine hundred nineteen".