5669818981 has 2 divisors, whose sum is σ = 5669818982. Its totient is φ = 5669818980.

The previous prime is 5669818967. The next prime is 5669819053. The reversal of 5669818981 is 1898189665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3628134756 + 2041684225 = 60234^2 + 45185^2 .

It is a cyclic number.

It is not a de Polignac number, because 5669818981 - 2¹³ = 5669810789 is a prime.

It is a super-2 number, since 2×5669818981² = 64293694554615756722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5669818901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2834909490 + 2834909491.

It is an arithmetic number, because the mean of its divisors is an integer number (2834909491).

Almost surely, 2^5669818981 is an apocalyptic number.

It is an amenable number.

5669818981 is a deficient number, since it is larger than the sum of its proper divisors (1).

5669818981 is an equidigital number, since it uses as much as digits as its factorization.

5669818981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7464960, while the sum is 61.

The square root of 5669818981 is about 75298.2003835417. The cubic root of 5669818981 is about 1783.1576092106.

The spelling of 5669818981 in words is "five billion, six hundred sixty-nine million, eight hundred eighteen thousand, nine hundred eighty-one".