6533665625 has 24 divisors (see below), whose sum is σ = 8184273048. Its totient is φ = 5215600000.

The previous prime is 6533665583. The next prime is 6533665631. The reversal of 6533665625 is 5265663356.

It can be written as a sum of positive squares in 12 ways, for example, as 6449374864 + 84290761 = 80308^2 + 9181^2 .

It is not a de Polignac number, because 6533665625 - 2⁶ = 6533665561 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6533665625.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1626119 + ... + 1630131.

It is an arithmetic number, because the mean of its divisors is an integer number (341011377).

Almost surely, 2^6533665625 is an apocalyptic number.

It is an amenable number.

6533665625 is a deficient number, since it is larger than the sum of its proper divisors (1650607423).

6533665625 is an frugal number, since it uses more digits than its factorization.

6533665625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4559 (or 4539 counting only the distinct ones).

The product of its digits is 2916000, while the sum is 47.

The square root of 6533665625 is about 80831.0931820175. The cubic root of 6533665625 is about 1869.4720143798.

The spelling of 6533665625 in words is "six billion, five hundred thirty-three million, six hundred sixty-five thousand, six hundred twenty-five".