25677666 has 48 divisors (see below), whose sum is σ = 64896000. Its totient is φ = 7334712.

The previous prime is 25677649. The next prime is 25677671. The reversal of 25677666 is 66677652.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4095 + ... + 8253.

It is an arithmetic number, because the mean of its divisors is an integer number (1352000).

Almost surely, 2^25677666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25677666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32448000).

25677666 is an abundant number, since it is smaller than the sum of its proper divisors (39218334).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25677666 is a wasteful number, since it uses less digits than its factorization.

25677666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4188 (or 4171 counting only the distinct ones).

The product of its digits is 635040, while the sum is 45.

The square root of 25677666 is about 5067.3134894143. The cubic root of 25677666 is about 295.0202648149.

The spelling of 25677666 in words is "twenty-five million, six hundred seventy-seven thousand, six hundred sixty-six".