816766826 has 8 divisors (see below), whose sum is σ = 1225386144. Its totient is φ = 408304780.

The previous prime is 816766793. The next prime is 816766829. The reversal of 816766826 is 628667618.

It is a happy number.

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

It is a super-2 number, since 2×816766826² = 1334216096108228552, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (816766829) 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, 25340 + ... + 47703.

It is an arithmetic number, because the mean of its divisors is an integer number (153173268).

Almost surely, 2^816766826 is an apocalyptic number.

816766826 is a deficient number, since it is larger than the sum of its proper divisors (408619318).

816766826 is a wasteful number, since it uses less digits than its factorization.

816766826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78636.

The product of its digits is 1161216, while the sum is 50.

The square root of 816766826 is about 28579.1327020258. The cubic root of 816766826 is about 934.7583716039.

The spelling of 816766826 in words is "eight hundred sixteen million, seven hundred sixty-six thousand, eight hundred twenty-six".