25016666 has 8 divisors (see below), whose sum is σ = 37546740. Its totient is φ = 12501088.

The previous prime is 25016603. The next prime is 25016671. The reversal of 25016666 is 66661052.

It can be written as a sum of positive squares in 2 ways, for example, as 18105025 + 6911641 = 4255^2 + 2629^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3470 + ... + 7878.

Almost surely, 2^25016666 is an apocalyptic number.

25016666 is a deficient number, since it is larger than the sum of its proper divisors (12530074).

25016666 is a wasteful number, since it uses less digits than its factorization.

25016666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7248.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 25016666 is about 5001.6663223370. Note that the first 3 decimals coincide. The cubic root of 25016666 is about 292.4667349610.

The spelling of 25016666 in words is "twenty-five million, sixteen thousand, six hundred sixty-six".