166818043 has 16 divisors (see below), whose sum is σ = 201137920. Its totient is φ = 135154656.

The previous prime is 166818023. The next prime is 166818061. The reversal of 166818043 is 340818661.

It is a de Polignac number, because none of the positive numbers 2^k-166818043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166817993 and 166818011.

It is not an unprimeable number, because it can be changed into a prime (166818023) 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 15 ways as a sum of consecutive naturals, for example, 71605 + ... + 73897.

It is an arithmetic number, because the mean of its divisors is an integer number (12571120).

Almost surely, 2^166818043 is an apocalyptic number.

166818043 is a deficient number, since it is larger than the sum of its proper divisors (34319877).

166818043 is a wasteful number, since it uses less digits than its factorization.

166818043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2866.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 166818043 is about 12915.8059369131. The cubic root of 166818043 is about 550.4877689458.

The spelling of 166818043 in words is "one hundred sixty-six million, eight hundred eighteen thousand, forty-three".