5656668473 has 2 divisors, whose sum is σ = 5656668474. Its totient is φ = 5656668472.

The previous prime is 5656668439. The next prime is 5656668529. The reversal of 5656668473 is 3748666565.

It is an a-pointer prime, because the next prime (5656668529) can be obtained adding 5656668473 to its sum of digits (56).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4402587904 + 1254080569 = 66352^2 + 35413^2 .

It is a cyclic number.

It is not a de Polignac number, because 5656668473 - 2¹⁶ = 5656602937 is a prime.

It is not a weakly prime, because it can be changed into another prime (5656667473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2828334236 + 2828334237.

It is an arithmetic number, because the mean of its divisors is an integer number (2828334237).

Almost surely, 2^5656668473 is an apocalyptic number.

It is an amenable number.

5656668473 is a deficient number, since it is larger than the sum of its proper divisors (1).

5656668473 is an equidigital number, since it uses as much as digits as its factorization.

5656668473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21772800, while the sum is 56.

The square root of 5656668473 is about 75210.8268336414. The cubic root of 5656668473 is about 1781.7779307577. Note that the first 3 decimals are identical.

The spelling of 5656668473 in words is "five billion, six hundred fifty-six million, six hundred sixty-eight thousand, four hundred seventy-three".