1668100873 has 4 divisors (see below), whose sum is σ = 1670745088. Its totient is φ = 1665456660.

The previous prime is 1668100817. The next prime is 1668100897. The reversal of 1668100873 is 3780018661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1668100873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1668100813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1321161 + ... + 1322422.

It is an arithmetic number, because the mean of its divisors is an integer number (417686272).

Almost surely, 2^1668100873 is an apocalyptic number.

It is an amenable number.

1668100873 is a deficient number, since it is larger than the sum of its proper divisors (2644215).

1668100873 is an equidigital number, since it uses as much as digits as its factorization.

1668100873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2644214.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 1668100873 is about 40842.3906376696. The cubic root of 1668100873 is about 1185.9710919190.

The spelling of 1668100873 in words is "one billion, six hundred sixty-eight million, one hundred thousand, eight hundred seventy-three".