3660869 has 4 divisors (see below), whose sum is σ = 3729996. Its totient is φ = 3591744.

The previous prime is 3660847. The next prime is 3660871. The reversal of 3660869 is 9680663.

It is a happy number.

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 2439844 + 1221025 = 1562^2 + 1105^2 .

It is a cyclic number.

It is not a de Polignac number, because 3660869 - 2¹² = 3656773 is a prime.

It is a super-2 number, since 2×3660869² = 26803923670322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3660889) 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, 34484 + ... + 34589.

It is an arithmetic number, because the mean of its divisors is an integer number (932499).

Almost surely, 2^3660869 is an apocalyptic number.

It is an amenable number.

3660869 is a deficient number, since it is larger than the sum of its proper divisors (69127).

3660869 is an equidigital number, since it uses as much as digits as its factorization.

3660869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69126.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 3660869 is about 1913.3397502796. The cubic root of 3660869 is about 154.1208502112.

The spelling of 3660869 in words is "three million, six hundred sixty thousand, eight hundred sixty-nine".