1669441537 has 2 divisors, whose sum is σ = 1669441538. Its totient is φ = 1669441536.

The previous prime is 1669441507. The next prime is 1669441549. The reversal of 1669441537 is 7351449661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1321395201 + 348046336 = 36351^2 + 18656^2 .

It is a cyclic number.

It is not a de Polignac number, because 1669441537 - 2¹⁹ = 1668917249 is a prime.

It is not a weakly prime, because it can be changed into another prime (1669441507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834720768 + 834720769.

It is an arithmetic number, because the mean of its divisors is an integer number (834720769).

Almost surely, 2^1669441537 is an apocalyptic number.

It is an amenable number.

1669441537 is a deficient number, since it is larger than the sum of its proper divisors (1).

1669441537 is an equidigital number, since it uses as much as digits as its factorization.

1669441537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 46.

The square root of 1669441537 is about 40858.7999946156. The cubic root of 1669441537 is about 1186.2887311782.

The spelling of 1669441537 in words is "one billion, six hundred sixty-nine million, four hundred forty-one thousand, five hundred thirty-seven".