26661055550 has 48 divisors (see below), whose sum is σ = 53883456000. Its totient is φ = 9777218400.

The previous prime is 26661055543. The next prime is 26661055633. The reversal of 26661055550 is 5555016662.

It is a junction number, because it is equal to n+sod(n) for n = 26661055498 and 26661055507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 423200 + ... + 482099.

It is an arithmetic number, because the mean of its divisors is an integer number (1122572000).

Almost surely, 2^26661055550 is an apocalyptic number.

26661055550 is an abundant number, since it is smaller than the sum of its proper divisors (27222400450).

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

26661055550 is a wasteful number, since it uses less digits than its factorization.

26661055550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905361 (or 905356 counting only the distinct ones).

The product of its (nonzero) digits is 270000, while the sum is 41.

The spelling of 26661055550 in words is "twenty-six billion, six hundred sixty-one million, fifty-five thousand, five hundred fifty".