25666043 has 8 divisors (see below), whose sum is σ = 27703536. Its totient is φ = 23637600.

The previous prime is 25666037. The next prime is 25666057. The reversal of 25666043 is 34066652.

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

It is a cyclic number.

It is not a de Polignac number, because 25666043 - 2⁴ = 25666027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25666013) 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, 4373 + ... + 8393.

It is an arithmetic number, because the mean of its divisors is an integer number (3462942).

Almost surely, 2^25666043 is an apocalyptic number.

25666043 is a deficient number, since it is larger than the sum of its proper divisors (2037493).

25666043 is a wasteful number, since it uses less digits than its factorization.

25666043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4525.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 25666043 is about 5066.1664994352. The cubic root of 25666043 is about 294.9757444387.

The spelling of 25666043 in words is "twenty-five million, six hundred sixty-six thousand, forty-three".