1020087566669 has 2 divisors, whose sum is σ = 1020087566670. Its totient is φ = 1020087566668.

The previous prime is 1020087566653. The next prime is 1020087566671. The reversal of 1020087566669 is 9666657800201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 760099754569 + 259987812100 = 871837^2 + 509890^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020087566669 - 2⁴ = 1020087566653 is a prime.

It is a super-2 number, since 2×1020087566669² (a number of 25 digits) contains 22 as substring.

Together with 1020087566671, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020087566689) 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 as a sum of consecutive naturals, namely, 510043783334 + 510043783335.

It is an arithmetic number, because the mean of its divisors is an integer number (510043783335).

Almost surely, 2^{1020087566669} is an apocalyptic number.

It is an amenable number.

1020087566669 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020087566669 is an equidigital number, since it uses as much as digits as its factorization.

1020087566669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6531840, while the sum is 56.

The spelling of 1020087566669 in words is "one trillion, twenty billion, eighty-seven million, five hundred sixty-six thousand, six hundred sixty-nine".