25506666660552 has 128 divisors (see below), whose sum is σ = 79561216880640. Its totient is φ = 6620115041280.

The previous prime is 25506666660523. The next prime is 25506666660571.

25506666660552 is nontrivially palindromic in base 10.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2748273 + ... + 7652864.

It is an arithmetic number, because the mean of its divisors is an integer number (621572006880).

Almost surely, 2^{25506666660552} is an apocalyptic number.

25506666660552 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

25506666660552 is an abundant number, since it is smaller than the sum of its proper divisors (54054550220088).

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

25506666660552 is a wasteful number, since it uses less digits than its factorization.

25506666660552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10402491 (or 10402487 counting only the distinct ones).

The product of its (nonzero) digits is 116640000, while the sum is 60.

The spelling of 25506666660552 in words is "twenty-five trillion, five hundred six billion, six hundred sixty-six million, six hundred sixty thousand, five hundred fifty-two".