10066661 has 16 divisors (see below), whose sum is σ = 11570688. Its totient is φ = 8673600.

The previous prime is 10066631. The next prime is 10066681. The reversal of 10066661 is 16666001.

It is a cyclic number.

It is not a de Polignac number, because 10066661 - 2⁶ = 10066597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10066661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10066631) 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 15 ways as a sum of consecutive naturals, for example, 17795 + ... + 18351.

It is an arithmetic number, because the mean of its divisors is an integer number (723168).

Almost surely, 2^10066661 is an apocalyptic number.

10066661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10066661 is a deficient number, since it is larger than the sum of its proper divisors (1504027).

10066661 is a wasteful number, since it uses less digits than its factorization.

10066661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 10066661 is about 3172.8001828038. The cubic root of 10066661 is about 215.9211317573.

It can be divided in two parts, 1006 and 6661, that added together give a palindrome (7667).

The spelling of 10066661 in words is "ten million, sixty-six thousand, six hundred sixty-one".