9661446197279 has 2 divisors, whose sum is σ = 9661446197280. Its totient is φ = 9661446197278.

The previous prime is 9661446197261. The next prime is 9661446197287. The reversal of 9661446197279 is 9727916441669.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9661446197279 - 2⁸ = 9661446197023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9661446191279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4830723098639 + 4830723098640.

It is an arithmetic number, because the mean of its divisors is an integer number (4830723098640).

Almost surely, 2^{9661446197279} is an apocalyptic number.

9661446197279 is a deficient number, since it is larger than the sum of its proper divisors (1).

9661446197279 is an equidigital number, since it uses as much as digits as its factorization.

9661446197279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 246903552, while the sum is 71.

The spelling of 9661446197279 in words is "nine trillion, six hundred sixty-one billion, four hundred forty-six million, one hundred ninety-seven thousand, two hundred seventy-nine".