166084009 has 32 divisors (see below), whose sum is σ = 212357376. Its totient is φ = 126385920.

The previous prime is 166083977. The next prime is 166084013. The reversal of 166084009 is 900480661.

It is a cyclic number.

It is not a de Polignac number, because 166084009 - 2⁵ = 166083977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166084049) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 360039 + ... + 360499.

It is an arithmetic number, because the mean of its divisors is an integer number (6636168).

Almost surely, 2^166084009 is an apocalyptic number.

It is an amenable number.

166084009 is a deficient number, since it is larger than the sum of its proper divisors (46273367).

166084009 is a wasteful number, since it uses less digits than its factorization.

166084009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 166084009 is about 12887.3584958284. The cubic root of 166084009 is about 549.6791616381.

The spelling of 166084009 in words is "one hundred sixty-six million, eighty-four thousand, nine".