5681020669 has 2 divisors, whose sum is σ = 5681020670. Its totient is φ = 5681020668.

The previous prime is 5681020619. The next prime is 5681020727. The reversal of 5681020669 is 9660201865.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3007096569 + 2673924100 = 54837^2 + 51710^2 .

It is a cyclic number.

It is not a de Polignac number, because 5681020669 - 2⁹ = 5681020157 is a prime.

It is a super-2 number, since 2×5681020669² = 64547991683210415122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5681020619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2840510334 + 2840510335.

It is an arithmetic number, because the mean of its divisors is an integer number (2840510335).

Almost surely, 2^5681020669 is an apocalyptic number.

It is an amenable number.

5681020669 is a deficient number, since it is larger than the sum of its proper divisors (1).

5681020669 is an equidigital number, since it uses as much as digits as its factorization.

5681020669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 5681020669 is about 75372.5458572284. The cubic root of 5681020669 is about 1784.3311466977.

The spelling of 5681020669 in words is "five billion, six hundred eighty-one million, twenty thousand, six hundred sixty-nine".