25555364066 has 4 divisors (see below), whose sum is σ = 38333046102. Its totient is φ = 12777682032.

The previous prime is 25555364041. The next prime is 25555364077. The reversal of 25555364066 is 66046355552.

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

It can be written as a sum of positive squares in only one way, i.e., 21838632841 + 3716731225 = 147779^2 + 60965^2 .

It is a super-3 number, since 3×25555364066³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25555364066.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6388841015 + ... + 6388841018.

Almost surely, 2^25555364066 is an apocalyptic number.

25555364066 is a deficient number, since it is larger than the sum of its proper divisors (12777682036).

25555364066 is a wasteful number, since it uses less digits than its factorization.

25555364066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12777682035.

The product of its (nonzero) digits is 3240000, while the sum is 47.

The spelling of 25555364066 in words is "twenty-five billion, five hundred fifty-five million, three hundred sixty-four thousand, sixty-six".