25667756220 has 48 divisors (see below), whose sum is σ = 71940280608. Its totient is φ = 6838014720.

The previous prime is 25667756207. The next prime is 25667756293. The reversal of 25667756220 is 2265776652.

It is a self number, because there is not a number n which added to its sum of digits gives 25667756220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148239 + ... + 270758.

It is an arithmetic number, because the mean of its divisors is an integer number (1498755846).

Almost surely, 2^25667756220 is an apocalyptic number.

25667756220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25667756220 is an abundant number, since it is smaller than the sum of its proper divisors (46272524388).

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

25667756220 is a wasteful number, since it uses less digits than its factorization.

25667756220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420030 (or 420028 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 48.

The spelling of 25667756220 in words is "twenty-five billion, six hundred sixty-seven million, seven hundred fifty-six thousand, two hundred twenty".