10664640689 has 2 divisors, whose sum is σ = 10664640690. Its totient is φ = 10664640688.

The previous prime is 10664640619. The next prime is 10664640793. The reversal of 10664640689 is 98604646601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10059087025 + 605553664 = 100295^2 + 24608^2 .

It is an emirp because it is prime and its reverse (98604646601) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10664640689 - 2³² = 6369673393 is a prime.

It is a super-2 number, since 2×10664640689² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10664640619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5332320344 + 5332320345.

It is an arithmetic number, because the mean of its divisors is an integer number (5332320345).

Almost surely, 2^10664640689 is an apocalyptic number.

It is an amenable number.

10664640689 is a deficient number, since it is larger than the sum of its proper divisors (1).

10664640689 is an equidigital number, since it uses as much as digits as its factorization.

10664640689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1492992, while the sum is 50.

The spelling of 10664640689 in words is "ten billion, six hundred sixty-four million, six hundred forty thousand, six hundred eighty-nine".