216966086653 has 4 divisors (see below), whose sum is σ = 217003558528. Its totient is φ = 216928614780.

The previous prime is 216966086627. The next prime is 216966086657. The reversal of 216966086653 is 356680669612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 216966086653 - 2²⁹ = 216429215741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216966086657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18727251 + ... + 18738832.

It is an arithmetic number, because the mean of its divisors is an integer number (54250889632).

Almost surely, 2^216966086653 is an apocalyptic number.

It is an amenable number.

216966086653 is a deficient number, since it is larger than the sum of its proper divisors (37471875).

216966086653 is an equidigital number, since it uses as much as digits as its factorization.

216966086653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37471874.

The product of its (nonzero) digits is 16796160, while the sum is 58.

The spelling of 216966086653 in words is "two hundred sixteen billion, nine hundred sixty-six million, eighty-six thousand, six hundred fifty-three".