25600066 has 8 divisors (see below), whose sum is σ = 38780604. Its totient is φ = 12673200.

The previous prime is 25600061. The next prime is 25600073. The reversal of 25600066 is 66000652.

It can be written as a sum of positive squares in 2 ways, for example, as 24453025 + 1147041 = 4945^2 + 1071^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 25600066.

It is not an unprimeable number, because it can be changed into a prime (25600061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63165 + ... + 63568.

Almost surely, 2^25600066 is an apocalyptic number.

25600066 is a deficient number, since it is larger than the sum of its proper divisors (13180538).

25600066 is a wasteful number, since it uses less digits than its factorization.

25600066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126836.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 25600066 is about 5059.6507784629. The cubic root of 25600066 is about 294.7227731682.

The spelling of 25600066 in words is "twenty-five million, six hundred thousand, sixty-six".