1665283969 has 4 divisors (see below), whose sum is σ = 1665376596. Its totient is φ = 1665191344.

The previous prime is 1665283967. The next prime is 1665283981. The reversal of 1665283969 is 9693825661.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 454243969 + 1211040000 = 21313^2 + 34800^2 .

It is a cyclic number.

It is not a de Polignac number, because 1665283969 - 2¹ = 1665283967 is a prime.

It is a super-2 number, since 2×1665283969² = 5546341394816785922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1665283967) 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 in 3 ways as a sum of consecutive naturals, for example, 9694 + ... + 58519.

It is an arithmetic number, because the mean of its divisors is an integer number (416344149).

Almost surely, 2^1665283969 is an apocalyptic number.

It is an amenable number.

1665283969 is a deficient number, since it is larger than the sum of its proper divisors (92627).

1665283969 is an equidigital number, since it uses as much as digits as its factorization.

1665283969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92626.

The product of its digits is 4199040, while the sum is 55.

The square root of 1665283969 is about 40807.8910138713. The cubic root of 1665283969 is about 1185.3031369133.

The spelling of 1665283969 in words is "one billion, six hundred sixty-five million, two hundred eighty-three thousand, nine hundred sixty-nine".