10669988621 has 2 divisors, whose sum is σ = 10669988622. Its totient is φ = 10669988620.

The previous prime is 10669988599. The next prime is 10669988633. The reversal of 10669988621 is 12688996601.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6466411396 + 4203577225 = 80414^2 + 64835^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10669988621 is a prime.

It is a super-2 number, since 2×10669988621² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10662988621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5334994310 + 5334994311.

It is an arithmetic number, because the mean of its divisors is an integer number (5334994311).

Almost surely, 2^10669988621 is an apocalyptic number.

It is an amenable number.

10669988621 is a deficient number, since it is larger than the sum of its proper divisors (1).

10669988621 is an equidigital number, since it uses as much as digits as its factorization.

10669988621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2239488, while the sum is 56.

The spelling of 10669988621 in words is "ten billion, six hundred sixty-nine million, nine hundred eighty-eight thousand, six hundred twenty-one".