25666749008 has 10 divisors (see below), whose sum is σ = 49729326234. Its totient is φ = 12833374496.

The previous prime is 25666749001. The next prime is 25666749011. The reversal of 25666749008 is 80094766652.

It can be written as a sum of positive squares in only one way, i.e., 22859020864 + 2807728144 = 151192^2 + 52988^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25666749001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802085891 + ... + 802085922.

Almost surely, 2^25666749008 is an apocalyptic number.

It is an amenable number.

25666749008 is a deficient number, since it is larger than the sum of its proper divisors (24062577226).

25666749008 is a wasteful number, since it uses less digits than its factorization.

25666749008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1604171821 (or 1604171815 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 53.

The spelling of 25666749008 in words is "twenty-five billion, six hundred sixty-six million, seven hundred forty-nine thousand, eight".