25966620 has 36 divisors (see below), whose sum is σ = 78765960. Its totient is φ = 6924384.

The previous prime is 25966613. The next prime is 25966621. The reversal of 25966620 is 2666952.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25966621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71950 + ... + 72309.

Almost surely, 2^25966620 is an apocalyptic number.

25966620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25966620 is an abundant number, since it is smaller than the sum of its proper divisors (52799340).

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

25966620 is a wasteful number, since it uses less digits than its factorization.

25966620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144274 (or 144269 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 25966620 is about 5095.7452840581. The cubic root of 25966620 is about 296.1227729074.

It can be divided in two parts, 2596 and 6620, that added together give a square (9216 = 96²).

The spelling of 25966620 in words is "twenty-five million, nine hundred sixty-six thousand, six hundred twenty".