216596670 has 64 divisors (see below), whose sum is σ = 535680000. Its totient is φ = 56025216.

The previous prime is 216596669. The next prime is 216596671. The reversal of 216596670 is 76695612.

It is an interprime number because it is at equal distance from previous prime (216596669) and next prime (216596671).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216596671) 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 31 ways as a sum of consecutive naturals, for example, 139056 + ... + 140604.

It is an arithmetic number, because the mean of its divisors is an integer number (8370000).

Almost surely, 2^216596670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216596670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267840000).

216596670 is an abundant number, since it is smaller than the sum of its proper divisors (319083330).

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

216596670 is a wasteful number, since it uses less digits than its factorization.

216596670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1697.

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 216596670 is about 14717.2235832714. The cubic root of 216596670 is about 600.5519642922.

The spelling of 216596670 in words is "two hundred sixteen million, five hundred ninety-six thousand, six hundred seventy".