10668521 has 2 divisors, whose sum is σ = 10668522. Its totient is φ = 10668520.

The previous prime is 10668421. The next prime is 10668533. The reversal of 10668521 is 12586601.

It is a happy number.

10668521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7778521 + 2890000 = 2789^2 + 1700^2 .

It is a cyclic number.

It is not a de Polignac number, because 10668521 - 2¹⁸ = 10406377 is a prime.

It is a super-2 number, since 2×10668521² = 227634680654882, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (10668421) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5334260 + 5334261.

It is an arithmetic number, because the mean of its divisors is an integer number (5334261).

Almost surely, 2^10668521 is an apocalyptic number.

It is an amenable number.

10668521 is a deficient number, since it is larger than the sum of its proper divisors (1).

10668521 is an equidigital number, since it uses as much as digits as its factorization.

10668521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 10668521 is about 3266.2701970290. The cubic root of 10668521 is about 220.1412385075.

The spelling of 10668521 in words is "ten million, six hundred sixty-eight thousand, five hundred twenty-one".