25440588460666 has 16 divisors (see below), whose sum is σ = 38584755909000. Its totient is φ = 12579748757568.

The previous prime is 25440588460591. The next prime is 25440588460669. The reversal of 25440588460666 is 66606488504452.

It can be written as a sum of positive squares in 4 ways, for example, as 19469529680041 + 5971058780625 = 4412429^2 + 2443575^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25440588460598 and 25440588460607.

It is not an unprimeable number, because it can be changed into a prime (25440588460669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186331545 + ... + 186468028.

Almost surely, 2^{25440588460666} is an apocalyptic number.

25440588460666 is a deficient number, since it is larger than the sum of its proper divisors (13144167448334).

25440588460666 is a wasteful number, since it uses less digits than its factorization.

25440588460666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372799953.

The product of its (nonzero) digits is 265420800, while the sum is 64.

The spelling of 25440588460666 in words is "twenty-five trillion, four hundred forty billion, five hundred eighty-eight million, four hundred sixty thousand, six hundred sixty-six".