9986662541 has 2 divisors, whose sum is σ = 9986662542. Its totient is φ = 9986662540.

The previous prime is 9986662531. The next prime is 9986662577. The reversal of 9986662541 is 1452666899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9946072900 + 40589641 = 99730^2 + 6371^2 .

It is a cyclic number.

It is not a de Polignac number, because 9986662541 - 2¹⁴ = 9986646157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9986662501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4993331270 + 4993331271.

It is an arithmetic number, because the mean of its divisors is an integer number (4993331271).

Almost surely, 2^9986662541 is an apocalyptic number.

It is an amenable number.

9986662541 is a deficient number, since it is larger than the sum of its proper divisors (1).

9986662541 is an equidigital number, since it uses as much as digits as its factorization.

9986662541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5598720, while the sum is 56.

The square root of 9986662541 is about 99933.2904541825. The cubic root of 9986662541 is about 2153.4764410738.

The spelling of 9986662541 in words is "nine billion, nine hundred eighty-six million, six hundred sixty-two thousand, five hundred forty-one".