10666213 has 2 divisors, whose sum is σ = 10666214. Its totient is φ = 10666212.

The previous prime is 10666189. The next prime is 10666219. The reversal of 10666213 is 31266601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10647169 + 19044 = 3263^2 + 138^2 .

It is an emirp because it is prime and its reverse (31266601) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10666213 is a prime.

It is a super-2 number, since 2×10666213² = 227536199522738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10666219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5333106 + 5333107.

It is an arithmetic number, because the mean of its divisors is an integer number (5333107).

Almost surely, 2^10666213 is an apocalyptic number.

It is an amenable number.

10666213 is a deficient number, since it is larger than the sum of its proper divisors (1).

10666213 is an equidigital number, since it uses as much as digits as its factorization.

10666213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 10666213 is about 3265.9168697320. The cubic root of 10666213 is about 220.1253624355.

The spelling of 10666213 in words is "ten million, six hundred sixty-six thousand, two hundred thirteen".