10000666 has 8 divisors (see below), whose sum is σ = 16154964. Its totient is φ = 4615680.

The previous prime is 10000657. The next prime is 10000667. The reversal of 10000666 is 66600001.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9126441 + 874225 = 3021^2 + 935^2 .

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

10000666 is a modest number, since divided by 666 gives 10 as remainder.

It is not an unprimeable number, because it can be changed into a prime (10000667) 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, 192295 + ... + 192346.

Almost surely, 2^10000666 is an apocalyptic number.

10000666 is a deficient number, since it is larger than the sum of its proper divisors (6154298).

10000666 is a wasteful number, since it uses less digits than its factorization.

10000666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384656.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 10000666 is about 3162.3829622612. The cubic root of 10000666 is about 215.4482517420.

Adding to 10000666 its reverse (66600001), we get a palindrome (76600667).

The spelling of 10000666 in words is "ten million, six hundred sixty-six", and thus it is an aban number.