10663666 has 8 divisors (see below), whose sum is σ = 17225964. Its totient is φ = 4921680.

The previous prime is 10663661. The next prime is 10663687. The reversal of 10663666 is 66636601.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9891025 + 772641 = 3145^2 + 879^2 .

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

It is a super-2 number, since 2×10663666² = 227427545119112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10663661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205045 + ... + 205096.

Almost surely, 2^10663666 is an apocalyptic number.

10663666 is a deficient number, since it is larger than the sum of its proper divisors (6562298).

10663666 is a wasteful number, since it uses less digits than its factorization.

10663666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410156.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 10663666 is about 3265.5269100101. The cubic root of 10663666 is about 220.1078396924.

The spelling of 10663666 in words is "ten million, six hundred sixty-three thousand, six hundred sixty-six".