818666342 has 16 divisors (see below), whose sum is σ = 1324330560. Its totient is φ = 377311872.

The previous prime is 818666287. The next prime is 818666371. The reversal of 818666342 is 243666818.

It is a junction number, because it is equal to n+sod(n) for n = 818666293 and 818666302.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3203 + ... + 40590.

It is an arithmetic number, because the mean of its divisors is an integer number (82770660).

Almost surely, 2^818666342 is an apocalyptic number.

818666342 is a deficient number, since it is larger than the sum of its proper divisors (505664218).

818666342 is a wasteful number, since it uses less digits than its factorization.

818666342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44527.

The product of its digits is 331776, while the sum is 44.

The square root of 818666342 is about 28612.3459716256. The cubic root of 818666342 is about 935.4824516941.

The spelling of 818666342 in words is "eight hundred eighteen million, six hundred sixty-six thousand, three hundred forty-two".