166966471 has 18 divisors (see below), whose sum is σ = 205008480. Its totient is φ = 135567432.

The previous prime is 166966447. The next prime is 166966477. The reversal of 166966471 is 174669661.

It is not a de Polignac number, because 166966471 - 2²³ = 158577863 is a prime.

It is a super-3 number, since 3×166966471³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166966477) 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 17 ways as a sum of consecutive naturals, for example, 12970 + ... + 22408.

It is an arithmetic number, because the mean of its divisors is an integer number (11389360).

Almost surely, 2^166966471 is an apocalyptic number.

166966471 is a deficient number, since it is larger than the sum of its proper divisors (38042009).

166966471 is an equidigital number, since it uses as much as digits as its factorization.

166966471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9491 (or 9465 counting only the distinct ones).

The product of its digits is 326592, while the sum is 46.

The square root of 166966471 is about 12921.5506422410. The cubic root of 166966471 is about 550.6509878552.

The spelling of 166966471 in words is "one hundred sixty-six million, nine hundred sixty-six thousand, four hundred seventy-one".