1668500085 has 16 divisors (see below), whose sum is σ = 3050971776. Its totient is φ = 762742848.

The previous prime is 1668500081. The next prime is 1668500101. The reversal of 1668500085 is 5800058661.

It is not a de Polignac number, because 1668500085 - 2² = 1668500081 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668500081) 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 15 ways as a sum of consecutive naturals, for example, 7945134 + ... + 7945343.

It is an arithmetic number, because the mean of its divisors is an integer number (190685736).

Almost surely, 2^1668500085 is an apocalyptic number.

1668500085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1668500085 is a deficient number, since it is larger than the sum of its proper divisors (1382471691).

1668500085 is a wasteful number, since it uses less digits than its factorization.

1668500085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15890492.

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 1668500085 is about 40847.2775714612. The cubic root of 1668500085 is about 1186.0656937374.

The spelling of 1668500085 in words is "one billion, six hundred sixty-eight million, five hundred thousand, eighty-five".