4221623665706 has 12 divisors (see below), whose sum is σ = 6356063880582. Its totient is φ = 2102964876624.

The previous prime is 4221623665703. The next prime is 4221623665723. The reversal of 4221623665706 is 6075663261224.

It can be written as a sum of positive squares in 3 ways, for example, as 560313628681 + 3661310037025 = 748541^2 + 1913455^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4221623665703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14440565 + ... + 14730008.

Almost surely, 2^{4221623665706} is an apocalyptic number.

4221623665706 is a deficient number, since it is larger than the sum of its proper divisors (2134440214876).

4221623665706 is an equidigital number, since it uses as much as digits as its factorization.

4221623665706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29171113 (or 29170844 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 50.

The spelling of 4221623665706 in words is "four trillion, two hundred twenty-one billion, six hundred twenty-three million, six hundred sixty-five thousand, seven hundred six".