96665186621 has 2 divisors, whose sum is σ = 96665186622. Its totient is φ = 96665186620.

The previous prime is 96665186591. The next prime is 96665186689. The reversal of 96665186621 is 12668156669.

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., 84412910521 + 12252276100 = 290539^2 + 110690^2 .

It is a cyclic number.

It is not a de Polignac number, because 96665186621 - 2¹⁴ = 96665170237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (96665186521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48332593310 + 48332593311.

It is an arithmetic number, because the mean of its divisors is an integer number (48332593311).

Almost surely, 2^96665186621 is an apocalyptic number.

It is an amenable number.

96665186621 is a deficient number, since it is larger than the sum of its proper divisors (1).

96665186621 is an equidigital number, since it uses as much as digits as its factorization.

96665186621 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 spelling of 96665186621 in words is "ninety-six billion, six hundred sixty-five million, one hundred eighty-six thousand, six hundred twenty-one".