816166 has 8 divisors (see below), whose sum is σ = 1318464. Its totient is φ = 376680.

The previous prime is 816163. The next prime is 816169. The reversal of 816166 is 661618.

It is an interprime number because it is at equal distance from previous prime (816163) and next prime (816169).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×816166² = 1332253879112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15670 + ... + 15721.

It is an arithmetic number, because the mean of its divisors is an integer number (164808).

2⁸¹⁶¹⁶⁶ is an apocalyptic number.

816166 is a deficient number, since it is larger than the sum of its proper divisors (502298).

816166 is a wasteful number, since it uses less digits than its factorization.

816166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31406.

The product of its digits is 1728, while the sum is 28.

The square root of 816166 is about 903.4190611228. The cubic root of 816166 is about 93.4529107924.

The spelling of 816166 in words is "eight hundred sixteen thousand, one hundred sixty-six".