166516406 has 24 divisors (see below), whose sum is σ = 291425040. Its totient is φ = 71150352.

The previous prime is 166516403. The next prime is 166516409. The reversal of 166516406 is 604615661.

It is an interprime number because it is at equal distance from previous prime (166516403) and next prime (166516409).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166516403) 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 11 ways as a sum of consecutive naturals, for example, 32816 + ... + 37548.

It is an arithmetic number, because the mean of its divisors is an integer number (12142710).

Almost surely, 2^166516406 is an apocalyptic number.

166516406 is a deficient number, since it is larger than the sum of its proper divisors (124908634).

166516406 is a wasteful number, since it uses less digits than its factorization.

166516406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5108 (or 5101 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 166516406 is about 12904.1236044917. The cubic root of 166516406 is about 550.1557751598.

The spelling of 166516406 in words is "one hundred sixty-six million, five hundred sixteen thousand, four hundred six".