25668069 has 32 divisors (see below), whose sum is σ = 42977280. Its totient is φ = 13286592.

The previous prime is 25668053. The next prime is 25668131. The reversal of 25668069 is 96086652.

It is not a de Polignac number, because 25668069 - 2⁴ = 25668053 is a prime.

It is a super-2 number, since 2×25668069² = 1317699532377522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25668069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25668029) 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, 7779 + ... + 10575.

It is an arithmetic number, because the mean of its divisors is an integer number (1343040).

Almost surely, 2^25668069 is an apocalyptic number.

It is an amenable number.

25668069 is a deficient number, since it is larger than the sum of its proper divisors (17309211).

25668069 is a wasteful number, since it uses less digits than its factorization.

25668069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2849.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 25668069 is about 5066.3664494389. The cubic root of 25668069 is about 294.9835057330.

The spelling of 25668069 in words is "twenty-five million, six hundred sixty-eight thousand, sixty-nine".