25065120666 has 8 divisors (see below), whose sum is σ = 50130241344. Its totient is φ = 8355040220.

The previous prime is 25065120659. The next prime is 25065120667. The reversal of 25065120666 is 66602156052.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

25065120666 is an admirable number.

It is a super-2 number, since 2×25065120666² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25065120667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2088760050 + ... + 2088760061.

It is an arithmetic number, because the mean of its divisors is an integer number (6266280168).

Almost surely, 2^25065120666 is an apocalyptic number.

25065120666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25065120666 is a wasteful number, since it uses less digits than its factorization.

25065120666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4177520116.

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 25065120666 in words is "twenty-five billion, sixty-five million, one hundred twenty thousand, six hundred sixty-six".