1665514013 has 8 divisors (see below), whose sum is σ = 1708310520. Its totient is φ = 1622821120.

The previous prime is 1665514007. The next prime is 1665514031. The reversal of 1665514013 is 3104155661.

It can be written as a sum of positive squares in 4 ways, for example, as 13741849 + 1651772164 = 3707^2 + 40642^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1665514013 - 2¹⁸ = 1665251869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665514093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7193 + ... + 58161.

It is an arithmetic number, because the mean of its divisors is an integer number (213538815).

Almost surely, 2^1665514013 is an apocalyptic number.

It is an amenable number.

1665514013 is a deficient number, since it is larger than the sum of its proper divisors (42796507).

1665514013 is an equidigital number, since it uses as much as digits as its factorization.

1665514013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51807.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 1665514013 is about 40810.7095380612. The cubic root of 1665514013 is about 1185.3577140555.

Adding to 1665514013 its reverse (3104155661), we get a palindrome (4769669674).

The spelling of 1665514013 in words is "one billion, six hundred sixty-five million, five hundred fourteen thousand, thirteen".