8064375661 has 2 divisors, whose sum is σ = 8064375662. Its totient is φ = 8064375660.

The previous prime is 8064375659. The next prime is 8064375673. The reversal of 8064375661 is 1665734608.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4994107561 + 3070268100 = 70669^2 + 55410^2 .

It is a cyclic number.

It is not a de Polignac number, because 8064375661 - 2¹ = 8064375659 is a prime.

Together with 8064375659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8064372661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4032187830 + 4032187831.

It is an arithmetic number, because the mean of its divisors is an integer number (4032187831).

Almost surely, 2^8064375661 is an apocalyptic number.

It is an amenable number.

8064375661 is a deficient number, since it is larger than the sum of its proper divisors (1).

8064375661 is an equidigital number, since it uses as much as digits as its factorization.

8064375661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 46.

The square root of 8064375661 is about 89801.8689170777. The cubic root of 8064375661 is about 2005.3503127304.

The spelling of 8064375661 in words is "eight billion, sixty-four million, three hundred seventy-five thousand, six hundred sixty-one".