6747221943857 has 2 divisors, whose sum is σ = 6747221943858. Its totient is φ = 6747221943856.

The previous prime is 6747221943829. The next prime is 6747221943941. The reversal of 6747221943857 is 7583491227476.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6714504007696 + 32717936161 = 2591236^2 + 180881^2 .

It is a cyclic number.

It is not a de Polignac number, because 6747221943857 - 2¹⁴ = 6747221927473 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6747221943793 and 6747221943802.

It is not a weakly prime, because it can be changed into another prime (6747221943827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3373610971928 + 3373610971929.

It is an arithmetic number, because the mean of its divisors is an integer number (3373610971929).

Almost surely, 2^{6747221943857} is an apocalyptic number.

It is an amenable number.

6747221943857 is a deficient number, since it is larger than the sum of its proper divisors (1).

6747221943857 is an equidigital number, since it uses as much as digits as its factorization.

6747221943857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 142248960, while the sum is 65.

The spelling of 6747221943857 in words is "six trillion, seven hundred forty-seven billion, two hundred twenty-one million, nine hundred forty-three thousand, eight hundred fifty-seven".