25660003 has 4 divisors (see below), whose sum is σ = 26144208. Its totient is φ = 25175800.

The previous prime is 25660001. The next prime is 25660007. The reversal of 25660003 is 30006652.

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

It is a cyclic number.

It is not a de Polignac number, because 25660003 - 2¹ = 25660001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25660001) 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, 242023 + ... + 242128.

It is an arithmetic number, because the mean of its divisors is an integer number (6536052).

Almost surely, 2^25660003 is an apocalyptic number.

25660003 is a deficient number, since it is larger than the sum of its proper divisors (484205).

25660003 is an equidigital number, since it uses as much as digits as its factorization.

25660003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484204.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 25660003 is about 5065.5703528823. The cubic root of 25660003 is about 294.9526037040.

Adding to 25660003 its reverse (30006652), we get a palindrome (55666655).

The spelling of 25660003 in words is "twenty-five million, six hundred sixty thousand, three".