55050166656021 has 32 divisors (see below), whose sum is σ = 78045490206720. Its totient is φ = 34395686551296.

The previous prime is 55050166656013. The next prime is 55050166656047. The reversal of 55050166656021 is 12065666105055.

It is not a de Polignac number, because 55050166656021 - 2³ = 55050166656013 is a prime.

It is a super-3 number, since 3×55050166656021³ (a number of 42 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55050166606021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 606320790 + ... + 606411576.

It is an arithmetic number, because the mean of its divisors is an integer number (2438921568960).

Almost surely, 2^{55050166656021} is an apocalyptic number.

55050166656021 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

55050166656021 is a deficient number, since it is larger than the sum of its proper divisors (22995323550699).

55050166656021 is a wasteful number, since it uses less digits than its factorization.

55050166656021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140793.

The product of its (nonzero) digits is 1620000, while the sum is 48.

The spelling of 55050166656021 in words is "fifty-five trillion, fifty billion, one hundred sixty-six million, six hundred fifty-six thousand, twenty-one".