25216866 has 32 divisors (see below), whose sum is σ = 56494080. Its totient is φ = 8337168.

The previous prime is 25216861. The next prime is 25216871. The reversal of 25216866 is 66861252.

It is an interprime number because it is at equal distance from previous prime (25216861) and next prime (25216871).

It is a self number, because there is not a number n which added to its sum of digits gives 25216866.

It is not an unprimeable number, because it can be changed into a prime (25216861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5020 + ... + 8696.

It is an arithmetic number, because the mean of its divisors is an integer number (1765440).

Almost surely, 2^25216866 is an apocalyptic number.

25216866 is an abundant number, since it is smaller than the sum of its proper divisors (31277214).

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

25216866 is a wasteful number, since it uses less digits than its factorization.

25216866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3815 (or 3809 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 25216866 is about 5021.6397720267. The cubic root of 25216866 is about 293.2448341265.

The spelling of 25216866 in words is "twenty-five million, two hundred sixteen thousand, eight hundred sixty-six".