1665325037 has 4 divisors (see below), whose sum is σ = 1665421596. Its totient is φ = 1665228480.

The previous prime is 1665325033. The next prime is 1665325061. The reversal of 1665325037 is 7305235661.

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 194295721 + 1471029316 = 13939^2 + 38354^2 .

It is a cyclic number.

It is not a de Polignac number, because 1665325037 - 2² = 1665325033 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 (1665325033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14558 + ... + 59519.

It is an arithmetic number, because the mean of its divisors is an integer number (416355399).

Almost surely, 2^1665325037 is an apocalyptic number.

It is an amenable number.

1665325037 is a deficient number, since it is larger than the sum of its proper divisors (96559).

1665325037 is an equidigital number, since it uses as much as digits as its factorization.

1665325037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96558.

The product of its (nonzero) digits is 113400, while the sum is 38.

The square root of 1665325037 is about 40808.3941977628. The cubic root of 1665325037 is about 1185.3128805226.

The spelling of 1665325037 in words is "one billion, six hundred sixty-five million, three hundred twenty-five thousand, thirty-seven".