25666070539 has 4 divisors (see below), whose sum is σ = 25708354624. Its totient is φ = 25623786456.

The previous prime is 25666070531. The next prime is 25666070557. The reversal of 25666070539 is 93507066652.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25666070539 - 2³ = 25666070531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25666070492 and 25666070501.

It is not an unprimeable number, because it can be changed into a prime (25666070531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21141132 + ... + 21142345.

It is an arithmetic number, because the mean of its divisors is an integer number (6427088656).

Almost surely, 2^25666070539 is an apocalyptic number.

25666070539 is a deficient number, since it is larger than the sum of its proper divisors (42284085).

25666070539 is an equidigital number, since it uses as much as digits as its factorization.

25666070539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42284084.

The product of its (nonzero) digits is 2041200, while the sum is 49.

The spelling of 25666070539 in words is "twenty-five billion, six hundred sixty-six million, seventy thousand, five hundred thirty-nine".