818066 has 4 divisors (see below), whose sum is σ = 1227102. Its totient is φ = 409032.

The previous prime is 818021. The next prime is 818093. The reversal of 818066 is 660818.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 660818 = 2 ⋅330409.

It can be written as a sum of positive squares in only one way, i.e., 765625 + 52441 = 875^2 + 229^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204515 + ... + 204518.

2⁸¹⁸⁰⁶⁶ is an apocalyptic number.

818066 is a deficient number, since it is larger than the sum of its proper divisors (409036).

818066 is a wasteful number, since it uses less digits than its factorization.

818066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409035.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 818066 is about 904.4700105587. The cubic root of 818066 is about 93.5253727360.

The spelling of 818066 in words is "eight hundred eighteen thousand, sixty-six".