10666351609 has 2 divisors, whose sum is σ = 10666351610. Its totient is φ = 10666351608.

The previous prime is 10666351573. The next prime is 10666351621. The reversal of 10666351609 is 90615366601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9201605625 + 1464745984 = 95925^2 + 38272^2 .

It is a cyclic number.

It is not a de Polignac number, because 10666351609 - 2²⁵ = 10632797177 is a prime.

It is a super-2 number, since 2×10666351609² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10666351909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5333175804 + 5333175805.

It is an arithmetic number, because the mean of its divisors is an integer number (5333175805).

Almost surely, 2^10666351609 is an apocalyptic number.

It is an amenable number.

10666351609 is a deficient number, since it is larger than the sum of its proper divisors (1).

10666351609 is an equidigital number, since it uses as much as digits as its factorization.

10666351609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 43.

The spelling of 10666351609 in words is "ten billion, six hundred sixty-six million, three hundred fifty-one thousand, six hundred nine".