816177966 has 8 divisors (see below), whose sum is σ = 1632355944. Its totient is φ = 272059320.

The previous prime is 816177961. The next prime is 816177997. The reversal of 816177966 is 669771618.

816177966 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

816177966 is an admirable number.

It is a super-2 number, since 2×816177966² = 1332292944367794312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816177961) 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, 68014825 + ... + 68014836.

It is an arithmetic number, because the mean of its divisors is an integer number (204044493).

Almost surely, 2^816177966 is an apocalyptic number.

816177966 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

816177966 is a wasteful number, since it uses less digits than its factorization.

816177966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136029666.

The product of its digits is 762048, while the sum is 51.

The square root of 816177966 is about 28568.8285724144. The cubic root of 816177966 is about 934.5336750184.

The spelling of 816177966 in words is "eight hundred sixteen million, one hundred seventy-seven thousand, nine hundred sixty-six".