166055055004987 has 2 divisors, whose sum is σ = 166055055004988. Its totient is φ = 166055055004986.

The previous prime is 166055055004963. The next prime is 166055055005039. The reversal of 166055055004987 is 789400550550661.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166055055004987 - 2¹¹ = 166055055002939 is a prime.

It is not a weakly prime, because it can be changed into another prime (166055055004907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83027527502493 + 83027527502494.

It is an arithmetic number, because the mean of its divisors is an integer number (83027527502494).

Almost surely, 2^{166055055004987} is an apocalyptic number.

166055055004987 is a deficient number, since it is larger than the sum of its proper divisors (1).

166055055004987 is an equidigital number, since it uses as much as digits as its factorization.

166055055004987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360000, while the sum is 61.

The spelling of 166055055004987 in words is "one hundred sixty-six trillion, fifty-five billion, fifty-five million, four thousand, nine hundred eighty-seven".