6658628861 has 2 divisors, whose sum is σ = 6658628862. Its totient is φ = 6658628860.

The previous prime is 6658628803. The next prime is 6658628917. The reversal of 6658628861 is 1688268566.

It is an a-pointer prime, because the next prime (6658628917) can be obtained adding 6658628861 to its sum of digits (56).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6620263225 + 38365636 = 81365^2 + 6194^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6658628861 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6658628797 and 6658628806.

It is a congruent number.

It is a weakly prime.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3329314430 + 3329314431.

It is an arithmetic number, because the mean of its divisors is an integer number (3329314431).

Almost surely, 2^6658628861 is an apocalyptic number.

It is an amenable number.

6658628861 is a deficient number, since it is larger than the sum of its proper divisors (1).

6658628861 is an equidigital number, since it uses as much as digits as its factorization.

6658628861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6635520, while the sum is 56.

The square root of 6658628861 is about 81600.4219413111. The cubic root of 6658628861 is about 1881.3153671014.

The spelling of 6658628861 in words is "six billion, six hundred fifty-eight million, six hundred twenty-eight thousand, eight hundred sixty-one".