25620666 has 64 divisors (see below), whose sum is σ = 57811968. Its totient is φ = 7527168.

The previous prime is 25620641. The next prime is 25620667. The reversal of 25620666 is 66602652.

It is not an unprimeable number, because it can be changed into a prime (25620667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 157101 + ... + 157263.

It is an arithmetic number, because the mean of its divisors is an integer number (903312).

Almost surely, 2^25620666 is an apocalyptic number.

25620666 is an abundant number, since it is smaller than the sum of its proper divisors (32191302).

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

25620666 is a wasteful number, since it uses less digits than its factorization.

25620666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 25620666 is about 5061.6860827199. The cubic root of 25620666 is about 294.8018050134.

The spelling of 25620666 in words is "twenty-five million, six hundred twenty thousand, six hundred sixty-six".