166659067 has 4 divisors (see below), whose sum is σ = 168134040. Its totient is φ = 165184096.

The previous prime is 166659061. The next prime is 166659071. The reversal of 166659067 is 760956661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166659067 - 2¹⁹ = 166134779 is a prime.

It is a super-2 number, since 2×166659067² = 55550489226620978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166659061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 737317 + ... + 737542.

It is an arithmetic number, because the mean of its divisors is an integer number (42033510).

Almost surely, 2^166659067 is an apocalyptic number.

166659067 is a deficient number, since it is larger than the sum of its proper divisors (1474973).

166659067 is a wasteful number, since it uses less digits than its factorization.

166659067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1474972.

The product of its (nonzero) digits is 408240, while the sum is 46.

The square root of 166659067 is about 12909.6501501784. The cubic root of 166659067 is about 550.3128435065.

The spelling of 166659067 in words is "one hundred sixty-six million, six hundred fifty-nine thousand, sixty-seven".