3765665 has 4 divisors (see below), whose sum is σ = 4518804. Its totient is φ = 3012528.

The previous prime is 3765661. The next prime is 3765673. The reversal of 3765665 is 5665673.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2876416 + 889249 = 1696^2 + 943^2 .

It is a cyclic number.

It is not a de Polignac number, because 3765665 - 2² = 3765661 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3765661) 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, 376562 + ... + 376571.

It is an arithmetic number, because the mean of its divisors is an integer number (1129701).

Almost surely, 2^3765665 is an apocalyptic number.

It is an amenable number.

3765665 is a deficient number, since it is larger than the sum of its proper divisors (753139).

3765665 is an equidigital number, since it uses as much as digits as its factorization.

3765665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753138.

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

The square root of 3765665 is about 1940.5321435112. The cubic root of 3765665 is about 155.5776571960.

The spelling of 3765665 in words is "three million, seven hundred sixty-five thousand, six hundred sixty-five".