55166522055516 has 18 divisors (see below), whose sum is σ = 139448708529312. Its totient is φ = 18388840685160.

The previous prime is 55166522055493. The next prime is 55166522055517. The reversal of 55166522055516 is 61555022566155.

55166522055516 is a `hidden beast` number, since 5 + 5 + 1 + 6 + 6 + 52 + 20 + 55 + 516 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55166522055517) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 766201695180 + ... + 766201695251.

Almost surely, 2^{55166522055516} is an apocalyptic number.

It is an amenable number.

55166522055516 is an abundant number, since it is smaller than the sum of its proper divisors (84282186473796).

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

55166522055516 is a wasteful number, since it uses less digits than its factorization.

55166522055516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1532403390441 (or 1532403390436 counting only the distinct ones).

The product of its (nonzero) digits is 13500000, while the sum is 54.

The spelling of 55166522055516 in words is "fifty-five trillion, one hundred sixty-six billion, five hundred twenty-two million, fifty-five thousand, five hundred sixteen".