25668616 has 16 divisors (see below), whose sum is σ = 48276540. Its totient is φ = 12794880.

The previous prime is 25668607. The next prime is 25668619. The reversal of 25668616 is 61686652.

It can be written as a sum of positive squares in 2 ways, for example, as 25100100 + 568516 = 5010^2 + 754^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25668619) 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, 2065 + ... + 7456.

Almost surely, 2^25668616 is an apocalyptic number.

It is an amenable number.

25668616 is a deficient number, since it is larger than the sum of its proper divisors (22607924).

25668616 is a wasteful number, since it uses less digits than its factorization.

25668616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9864 (or 9860 counting only the distinct ones).

The product of its digits is 103680, while the sum is 40.

The square root of 25668616 is about 5066.4204326131. The cubic root of 25668616 is about 294.9856011358.

The spelling of 25668616 in words is "twenty-five million, six hundred sixty-eight thousand, six hundred sixteen".