6699943852061 has 2 divisors, whose sum is σ = 6699943852062. Its totient is φ = 6699943852060.

The previous prime is 6699943852027. The next prime is 6699943852087. The reversal of 6699943852061 is 1602583499966.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5377227643225 + 1322716208836 = 2318885^2 + 1150094^2 .

It is a cyclic number.

It is not a de Polignac number, because 6699943852061 - 2¹⁰ = 6699943851037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6699943851982 and 6699943852000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6699943851061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3349971926030 + 3349971926031.

It is an arithmetic number, because the mean of its divisors is an integer number (3349971926031).

Almost surely, 2^{6699943852061} is an apocalyptic number.

It is an amenable number.

6699943852061 is a deficient number, since it is larger than the sum of its proper divisors (1).

6699943852061 is an equidigital number, since it uses as much as digits as its factorization.

6699943852061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 151165440, while the sum is 68.

The spelling of 6699943852061 in words is "six trillion, six hundred ninety-nine billion, nine hundred forty-three million, eight hundred fifty-two thousand, sixty-one".