216676161626667 has 4 divisors (see below), whose sum is σ = 288901548835560. Its totient is φ = 144450774417776.

The previous prime is 216676161626627. The next prime is 216676161626669. The reversal of 216676161626667 is 766626161676612.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 216676161626667 - 2¹⁶ = 216676161561131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216676161626669) 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, 36112693604442 + ... + 36112693604447.

It is an arithmetic number, because the mean of its divisors is an integer number (72225387208890).

Almost surely, 2^{216676161626667} is an apocalyptic number.

216676161626667 is a deficient number, since it is larger than the sum of its proper divisors (72225387208893).

216676161626667 is an equidigital number, since it uses as much as digits as its factorization.

216676161626667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72225387208892.

The product of its digits is 329204736, while the sum is 69.

The spelling of 216676161626667 in words is "two hundred sixteen trillion, six hundred seventy-six billion, one hundred sixty-one million, six hundred twenty-six thousand, six hundred sixty-seven".