166550055 has 16 divisors (see below), whose sum is σ = 304548864. Its totient is φ = 76137120.

The previous prime is 166550053. The next prime is 166550057. The reversal of 166550055 is 550055661.

It is an interprime number because it is at equal distance from previous prime (166550053) and next prime (166550057).

It is not a de Polignac number, because 166550055 - 2¹ = 166550053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166549998 and 166550025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166550053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 792991 + ... + 793200.

It is an arithmetic number, because the mean of its divisors is an integer number (19034304).

Almost surely, 2^166550055 is an apocalyptic number.

166550055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

166550055 is a deficient number, since it is larger than the sum of its proper divisors (137998809).

166550055 is a wasteful number, since it uses less digits than its factorization.

166550055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1586206.

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 166550055 is about 12905.4273466631. The cubic root of 166550055 is about 550.1928304572.

The spelling of 166550055 in words is "one hundred sixty-six million, five hundred fifty thousand, fifty-five".