6689455061 has 2 divisors, whose sum is σ = 6689455062. Its totient is φ = 6689455060.

The previous prime is 6689455013. The next prime is 6689455111. The reversal of 6689455061 is 1605549866.

It is a happy number.

It is an a-pointer prime, because the next prime (6689455111) can be obtained adding 6689455061 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6566022961 + 123432100 = 81031^2 + 11110^2 .

It is a cyclic number.

It is not a de Polignac number, because 6689455061 - 2¹⁴ = 6689438677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6689455961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3344727530 + 3344727531.

It is an arithmetic number, because the mean of its divisors is an integer number (3344727531).

Almost surely, 2^6689455061 is an apocalyptic number.

It is an amenable number.

6689455061 is a deficient number, since it is larger than the sum of its proper divisors (1).

6689455061 is an equidigital number, since it uses as much as digits as its factorization.

6689455061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1555200, while the sum is 50.

The square root of 6689455061 is about 81789.0888872104. The cubic root of 6689455061 is about 1884.2140889511.

The spelling of 6689455061 in words is "six billion, six hundred eighty-nine million, four hundred fifty-five thousand, sixty-one".