216065770 has 16 divisors (see below), whose sum is σ = 391718880. Its totient is φ = 85803984.

The previous prime is 216065761. The next prime is 216065807. The reversal of 216065770 is 77560612.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76332 + ... + 79111.

It is an arithmetic number, because the mean of its divisors is an integer number (24482430).

Almost surely, 2^216065770 is an apocalyptic number.

216065770 is a deficient number, since it is larger than the sum of its proper divisors (175653110).

216065770 is a wasteful number, since it uses less digits than its factorization.

216065770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155589.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 216065770 is about 14699.1758272360. The cubic root of 216065770 is about 600.0608919682.

The spelling of 216065770 in words is "two hundred sixteen million, sixty-five thousand, seven hundred seventy".