166671027 has 24 divisors (see below), whose sum is σ = 255768240. Its totient is φ = 108397440.

The previous prime is 166671023. The next prime is 166671073. The reversal of 166671027 is 720176661.

It is not a de Polignac number, because 166671027 - 2² = 166671023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166670982 and 166671000.

It is not an unprimeable number, because it can be changed into a prime (166671023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1599 + ... + 18327.

It is an arithmetic number, because the mean of its divisors is an integer number (10657010).

Almost surely, 2^166671027 is an apocalyptic number.

166671027 is a deficient number, since it is larger than the sum of its proper divisors (89097213).

166671027 is an equidigital number, since it uses as much as digits as its factorization.

166671027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16785 (or 16773 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 166671027 is about 12910.1133612374. The cubic root of 166671027 is about 550.3260072751.

The spelling of 166671027 in words is "one hundred sixty-six million, six hundred seventy-one thousand, twenty-seven".