2251666625560 has 32 divisors (see below), whose sum is σ = 5526818082000. Its totient is φ = 818787863680.

The previous prime is 2251666625543. The next prime is 2251666625569. The reversal of 2251666625560 is 655266661522.

It is a junction number, because it is equal to n+sod(n) for n = 2251666625498 and 2251666625507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251666625569) 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 7 ways as a sum of consecutive naturals, for example, 2558711635 + ... + 2558712514.

Almost surely, 2^{2251666625560} is an apocalyptic number.

2251666625560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2251666625560 is an abundant number, since it is smaller than the sum of its proper divisors (3275151456440).

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

2251666625560 is a wasteful number, since it uses less digits than its factorization.

2251666625560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5117424171 (or 5117424167 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 52.

The spelling of 2251666625560 in words is "two trillion, two hundred fifty-one billion, six hundred sixty-six million, six hundred twenty-five thousand, five hundred sixty".