166640594 has 16 divisors (see below), whose sum is σ = 253538208. Its totient is φ = 82132512.

The previous prime is 166640581. The next prime is 166640597. The reversal of 166640594 is 495046661.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (166640597) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101609 + ... + 103235.

It is an arithmetic number, because the mean of its divisors is an integer number (15846138).

Almost surely, 2^166640594 is an apocalyptic number.

166640594 is a deficient number, since it is larger than the sum of its proper divisors (86897614).

166640594 is a wasteful number, since it uses less digits than its factorization.

166640594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2329.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 166640594 is about 12908.9346578252. The cubic root of 166640594 is about 550.2925099697.

The spelling of 166640594 in words is "one hundred sixty-six million, six hundred forty thousand, five hundred ninety-four".