10666257647 has 2 divisors, whose sum is σ = 10666257648. Its totient is φ = 10666257646.

The previous prime is 10666257631. The next prime is 10666257653. The reversal of 10666257647 is 74675266601.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10666257647 - 2⁴ = 10666257631 is a prime.

It is a super-2 number, since 2×10666257647² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10666257595 and 10666257604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10666257697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5333128823 + 5333128824.

It is an arithmetic number, because the mean of its divisors is an integer number (5333128824).

Almost surely, 2^10666257647 is an apocalyptic number.

10666257647 is a deficient number, since it is larger than the sum of its proper divisors (1).

10666257647 is an equidigital number, since it uses as much as digits as its factorization.

10666257647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2540160, while the sum is 50.

The spelling of 10666257647 in words is "ten billion, six hundred sixty-six million, two hundred fifty-seven thousand, six hundred forty-seven".