55166550655518 has 64 divisors (see below), whose sum is σ = 126558494668800. Its totient is φ = 17794034691840.

The previous prime is 55166550655511. The next prime is 55166550655519. The reversal of 55166550655518 is 81555605566155.

55166550655518 is a `hidden beast` number, since 5 + 5 + 1 + 6 + 6 + 5 + 50 + 65 + 5 + 518 = 666.

55166550655518 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×55166550655518² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55166550655511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16878030 + ... + 19879662.

It is an arithmetic number, because the mean of its divisors is an integer number (1977476479200).

Almost surely, 2^{55166550655518} is an apocalyptic number.

55166550655518 is an abundant number, since it is smaller than the sum of its proper divisors (71391944013282).

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

55166550655518 is a wasteful number, since it uses less digits than its factorization.

55166550655518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3012654 (or 3012648 counting only the distinct ones).

The product of its (nonzero) digits is 135000000, while the sum is 63.

The spelling of 55166550655518 in words is "fifty-five trillion, one hundred sixty-six billion, five hundred fifty million, six hundred fifty-five thousand, five hundred eighteen".