2166323240663 has 8 divisors (see below), whose sum is σ = 2212028100768. Its totient is φ = 2121051602304.

The previous prime is 2166323240659. The next prime is 2166323240693. The reversal of 2166323240663 is 3660423236612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2166323240663 - 2² = 2166323240659 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 (2166323240693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108295331 + ... + 108315332.

It is an arithmetic number, because the mean of its divisors is an integer number (276503512596).

Almost surely, 2^{2166323240663} is an apocalyptic number.

2166323240663 is a deficient number, since it is larger than the sum of its proper divisors (45704860105).

2166323240663 is a wasteful number, since it uses less digits than its factorization.

2166323240663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216610873.

The product of its (nonzero) digits is 1119744, while the sum is 44.

The spelling of 2166323240663 in words is "two trillion, one hundred sixty-six billion, three hundred twenty-three million, two hundred forty thousand, six hundred sixty-three".