10181666 has 12 divisors (see below), whose sum is σ = 16787526. Its totient is φ = 4627920.

The previous prime is 10181659. The next prime is 10181683. The reversal of 10181666 is 66618101.

It can be written as a sum of positive squares in only one way, i.e., 10106041 + 75625 = 3179^2 + 275^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20795 + ... + 21278.

Almost surely, 2^10181666 is an apocalyptic number.

10181666 is a deficient number, since it is larger than the sum of its proper divisors (6605860).

10181666 is a wasteful number, since it uses less digits than its factorization.

10181666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42097 (or 42086 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 10181666 is about 3190.8722945301. The cubic root of 10181666 is about 216.7402726906.

Adding to 10181666 its reverse (66618101), we get a palindrome (76799767).

The spelling of 10181666 in words is "ten million, one hundred eighty-one thousand, six hundred sixty-six".