100006665 has 64 divisors (see below), whose sum is σ = 187183872. Its totient is φ = 45056000.

The previous prime is 100006661. The next prime is 100006693. The reversal of 100006665 is 566600001.

It is not a de Polignac number, because 100006665 - 2² = 100006661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100006661) 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 63 ways as a sum of consecutive naturals, for example, 283129 + ... + 283481.

It is an arithmetic number, because the mean of its divisors is an integer number (2924748).

Almost surely, 2^100006665 is an apocalyptic number.

100006665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

100006665 is a deficient number, since it is larger than the sum of its proper divisors (87177207).

100006665 is a wasteful number, since it uses less digits than its factorization.

100006665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 100006665 is about 10000.3332444474. Note that the first 3 decimals coincide. The cubic root of 100006665 is about 464.1691951954.

Adding to 100006665 its reverse (566600001), we get a palindrome (666606666).

The spelling of 100006665 in words is "one hundred million, six thousand, six hundred sixty-five".