216056705066 has 4 divisors (see below), whose sum is σ = 324085057602. Its totient is φ = 108028352532.

The previous prime is 216056705063. The next prime is 216056705071. The reversal of 216056705066 is 660507650612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 171400140025 + 44656565041 = 414005^2 + 211321^2 .

It is not an unprimeable number, because it can be changed into a prime (216056705063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54014176265 + ... + 54014176268.

Almost surely, 2^216056705066 is an apocalyptic number.

216056705066 is a deficient number, since it is larger than the sum of its proper divisors (108028352536).

216056705066 is a wasteful number, since it uses less digits than its factorization.

216056705066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108028352535.

The product of its (nonzero) digits is 453600, while the sum is 44.

The spelling of 216056705066 in words is "two hundred sixteen billion, fifty-six million, seven hundred five thousand, sixty-six".