666000101 has 12 divisors (see below), whose sum is σ = 722150208. Its totient is φ = 613935504.

The previous prime is 666000089. The next prime is 666000107. The reversal of 666000101 is 101000666.

It is a de Polignac number, because none of the positive numbers 2^k-666000101 is a prime.

It is a super-2 number, since 2×666000101² = 887112269064020402, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666000107) 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 11 ways as a sum of consecutive naturals, for example, 146996 + ... + 151458.

It is an arithmetic number, because the mean of its divisors is an integer number (60179184).

Almost surely, 2^666000101 is an apocalyptic number.

It is an amenable number.

666000101 is a deficient number, since it is larger than the sum of its proper divisors (56150107).

666000101 is a wasteful number, since it uses less digits than its factorization.

666000101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5372 (or 5359 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 666000101 is about 25806.9777579631. The cubic root of 666000101 is about 873.2892182748.

Adding to 666000101 its reverse (101000666), we get a palindrome (767000767).

The spelling of 666000101 in words is "six hundred sixty-six million, one hundred one", and thus it is an aban number.