7664252689 has 2 divisors, whose sum is σ = 7664252690. Its totient is φ = 7664252688.

The previous prime is 7664252653. The next prime is 7664252719. The reversal of 7664252689 is 9862524667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7106490000 + 557762689 = 84300^2 + 23617^2 .

It is a cyclic number.

It is not a de Polignac number, because 7664252689 - 2¹⁵ = 7664219921 is a prime.

It is not a weakly prime, because it can be changed into another prime (7664250689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3832126344 + 3832126345.

It is an arithmetic number, because the mean of its divisors is an integer number (3832126345).

Almost surely, 2^7664252689 is an apocalyptic number.

It is an amenable number.

7664252689 is a deficient number, since it is larger than the sum of its proper divisors (1).

7664252689 is an equidigital number, since it uses as much as digits as its factorization.

7664252689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8709120, while the sum is 55.

The square root of 7664252689 is about 87545.7177079496. The cubic root of 7664252689 is about 1971.6202572956.

The spelling of 7664252689 in words is "seven billion, six hundred sixty-four million, two hundred fifty-two thousand, six hundred eighty-nine".