6998866541 has 2 divisors, whose sum is σ = 6998866542. Its totient is φ = 6998866540.

The previous prime is 6998866531. The next prime is 6998866571. The reversal of 6998866541 is 1456688996.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6444075625 + 554790916 = 80275^2 + 23554^2 .

It is a cyclic number.

It is not a de Polignac number, because 6998866541 - 2¹⁸ = 6998604397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6998866531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3499433270 + 3499433271.

It is an arithmetic number, because the mean of its divisors is an integer number (3499433271).

Almost surely, 2^6998866541 is an apocalyptic number.

It is an amenable number.

6998866541 is a deficient number, since it is larger than the sum of its proper divisors (1).

6998866541 is an equidigital number, since it uses as much as digits as its factorization.

6998866541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22394880, while the sum is 62.

The square root of 6998866541 is about 83659.2286660593. The cubic root of 6998866541 is about 1912.8279281960.

The spelling of 6998866541 in words is "six billion, nine hundred ninety-eight million, eight hundred sixty-six thousand, five hundred forty-one".