216560667 has 16 divisors (see below), whose sum is σ = 297211680. Its totient is φ = 140159232.

The previous prime is 216560657. The next prime is 216560681. The reversal of 216560667 is 766065612.

216560667 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216560667 - 2⁸ = 216560411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216560657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54583 + ... + 58415.

It is an arithmetic number, because the mean of its divisors is an integer number (18575730).

Almost surely, 2^216560667 is an apocalyptic number.

216560667 is a deficient number, since it is larger than the sum of its proper divisors (80651013).

216560667 is a wasteful number, since it uses less digits than its factorization.

216560667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4382.

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 216560667 is about 14716.0003737429. Note that the first 3 decimals coincide. The cubic root of 216560667 is about 600.5186875872.

The spelling of 216560667 in words is "two hundred sixteen million, five hundred sixty thousand, six hundred sixty-seven".