55666640050 has 24 divisors (see below), whose sum is σ = 118331372736. Its totient is φ = 19085705040.

The previous prime is 55666640047. The next prime is 55666640053. The reversal of 55666640050 is 5004666655.

It is an interprime number because it is at equal distance from previous prime (55666640047) and next prime (55666640053).

It is a junction number, because it is equal to n+sod(n) for n = 55666639979 and 55666640006.

It is not an unprimeable number, because it can be changed into a prime (55666640053) 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, 79523422 + ... + 79524121.

It is an arithmetic number, because the mean of its divisors is an integer number (4930473864).

Almost surely, 2^55666640050 is an apocalyptic number.

55666640050 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55666640050 is an abundant number, since it is smaller than the sum of its proper divisors (62664732686).

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

55666640050 is a wasteful number, since it uses less digits than its factorization.

55666640050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159047562 (or 159047557 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 43.

The spelling of 55666640050 in words is "fifty-five billion, six hundred sixty-six million, six hundred forty thousand, fifty".