25066643 has 32 divisors (see below), whose sum is σ = 31987200. Its totient is φ = 19160064.

The previous prime is 25066633. The next prime is 25066663. The reversal of 25066643 is 34666052.

It is not a de Polignac number, because 25066643 - 2⁴ = 25066627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25066633) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 258371 + ... + 258467.

It is an arithmetic number, because the mean of its divisors is an integer number (999600).

Almost surely, 2^25066643 is an apocalyptic number.

25066643 is a deficient number, since it is larger than the sum of its proper divisors (6920557).

25066643 is a wasteful number, since it uses less digits than its factorization.

25066643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219.

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

The square root of 25066643 is about 5006.6598646203. The cubic root of 25066643 is about 292.6613637119.

The spelling of 25066643 in words is "twenty-five million, sixty-six thousand, six hundred forty-three".