1669669601 has 2 divisors, whose sum is σ = 1669669602. Its totient is φ = 1669669600.

The previous prime is 1669669597. The next prime is 1669669607. The reversal of 1669669601 is 1069669661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1269069376 + 400600225 = 35624^2 + 20015^2 .

It is an emirp because it is prime and its reverse (1069669661) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 1096996991 and 1996996901.

It is a cyclic number.

It is not a de Polignac number, because 1669669601 - 2² = 1669669597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1669669601.

It is not a weakly prime, because it can be changed into another prime (1669669607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834834800 + 834834801.

It is an arithmetic number, because the mean of its divisors is an integer number (834834801).

Almost surely, 2^1669669601 is an apocalyptic number.

It is an amenable number.

1669669601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1669669601 is an equidigital number, since it uses as much as digits as its factorization.

1669669601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 629856, while the sum is 50.

The square root of 1669669601 is about 40861.5907791168. The cubic root of 1669669601 is about 1186.3427487300.

The spelling of 1669669601 in words is "one billion, six hundred sixty-nine million, six hundred sixty-nine thousand, six hundred one".