7664941481 has 2 divisors, whose sum is σ = 7664941482. Its totient is φ = 7664941480.

The previous prime is 7664941457. The next prime is 7664941489. The reversal of 7664941481 is 1841494667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7002342400 + 662599081 = 83680^2 + 25741^2 .

It is a cyclic number.

It is not a de Polignac number, because 7664941481 - 2¹⁰ = 7664940457 is a prime.

It is a super-2 number, since 2×7664941481² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (7664941489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3832470740 + 3832470741.

It is an arithmetic number, because the mean of its divisors is an integer number (3832470741).

Almost surely, 2^7664941481 is an apocalyptic number.

It is an amenable number.

7664941481 is a deficient number, since it is larger than the sum of its proper divisors (1).

7664941481 is an equidigital number, since it uses as much as digits as its factorization.

7664941481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 50.

The square root of 7664941481 is about 87549.6515184384. The cubic root of 7664941481 is about 1971.6793191783.

The spelling of 7664941481 in words is "seven billion, six hundred sixty-four million, nine hundred forty-one thousand, four hundred eighty-one".