166671667 has 8 divisors (see below), whose sum is σ = 175770000. Its totient is φ = 157605984.

The previous prime is 166671649. The next prime is 166671691. The reversal of 166671667 is 766176661.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166671667 - 2⁷ = 166671539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166671607) 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 7 ways as a sum of consecutive naturals, for example, 2709 + ... + 18457.

It is an arithmetic number, because the mean of its divisors is an integer number (21971250).

Almost surely, 2^166671667 is an apocalyptic number.

166671667 is a deficient number, since it is larger than the sum of its proper divisors (9098333).

166671667 is a wasteful number, since it uses less digits than its factorization.

166671667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16325.

The product of its digits is 381024, while the sum is 46.

The square root of 166671667 is about 12910.1381479828. The cubic root of 166671667 is about 550.3267116730.

The spelling of 166671667 in words is "one hundred sixty-six million, six hundred seventy-one thousand, six hundred sixty-seven".