55016661660 has 96 divisors (see below), whose sum is σ = 158007931200. Its totient is φ = 14297567232.

The previous prime is 55016661617. The next prime is 55016661671. The reversal of 55016661660 is 6616661055.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 415764 + ... + 531876.

It is an arithmetic number, because the mean of its divisors is an integer number (1645915950).

Almost surely, 2^55016661660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55016661660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79003965600).

55016661660 is an abundant number, since it is smaller than the sum of its proper divisors (102991269540).

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

55016661660 is a wasteful number, since it uses less digits than its factorization.

55016661660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116327 (or 116325 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 55016661660 in words is "fifty-five billion, sixteen million, six hundred sixty-one thousand, six hundred sixty".