7666636465 has 16 divisors (see below), whose sum is σ = 9399304656. Its totient is φ = 6001459200.

The previous prime is 7666636463. The next prime is 7666636493. The reversal of 7666636465 is 5646366667.

It can be written as a sum of positive squares in 8 ways, for example, as 1496219761 + 6170416704 = 38681^2 + 78552^2 .

It is not a de Polignac number, because 7666636465 - 2¹ = 7666636463 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7666636463) 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 in 15 ways as a sum of consecutive naturals, for example, 6256 + ... + 123985.

It is an arithmetic number, because the mean of its divisors is an integer number (587456541).

Almost surely, 2^7666636465 is an apocalyptic number.

It is an amenable number.

7666636465 is a deficient number, since it is larger than the sum of its proper divisors (1732668191).

7666636465 is a wasteful number, since it uses less digits than its factorization.

7666636465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130500.

The product of its digits is 19595520, while the sum is 55.

The square root of 7666636465 is about 87559.3311132514. The cubic root of 7666636465 is about 1971.8246439924.

The spelling of 7666636465 in words is "seven billion, six hundred sixty-six million, six hundred thirty-six thousand, four hundred sixty-five".