816966080 has 56 divisors (see below), whose sum is σ = 2223320928. Its totient is φ = 280101888.

The previous prime is 816966067. The next prime is 816966083. The reversal of 816966080 is 80669618.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816966083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180119 + ... + 184598.

Almost surely, 2^816966080 is an apocalyptic number.

816966080 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

816966080 is an abundant number, since it is smaller than the sum of its proper divisors (1406354848).

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

816966080 is a wasteful number, since it uses less digits than its factorization.

816966080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364741 (or 364731 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 816966080 is about 28582.6184944627. The cubic root of 816966080 is about 934.8343782824.

The spelling of 816966080 in words is "eight hundred sixteen million, nine hundred sixty-six thousand, eighty".