1791666216 has 224 divisors, whose sum is σ = 5288371200. Its totient is φ = 568270080.

The previous prime is 1791666187. The next prime is 1791666221. The reversal of 1791666216 is 6126661971.

It is an unprimeable number.

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 55 ways as a sum of consecutive naturals, for example, 14107545 + ... + 14107671.

It is an arithmetic number, because the mean of its divisors is an integer number (23608800).

Almost surely, 2^1791666216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1791666216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2644185600).

1791666216 is an abundant number, since it is smaller than the sum of its proper divisors (3496704984).

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

1791666216 is a wasteful number, since it uses less digits than its factorization.

1791666216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251 (or 232 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 1791666216 is about 42328.0783405058. The cubic root of 1791666216 is about 1214.5601700189.

The spelling of 1791666216 in words is "one billion, seven hundred ninety-one million, six hundred sixty-six thousand, two hundred sixteen".