3665026 has 4 divisors (see below), whose sum is σ = 5497542. Its totient is φ = 1832512.

The previous prime is 3665023. The next prime is 3665029. The reversal of 3665026 is 6205663.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6205663 = 17 ⋅365039.

It is an interprime number because it is at equal distance from previous prime (3665023) and next prime (3665029).

It can be written as a sum of positive squares in only one way, i.e., 2399401 + 1265625 = 1549^2 + 1125^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3664985 and 3665003.

It is not an unprimeable number, because it can be changed into a prime (3665023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 916255 + ... + 916258.

Almost surely, 2^3665026 is an apocalyptic number.

3665026 is a deficient number, since it is larger than the sum of its proper divisors (1832516).

3665026 is a wasteful number, since it uses less digits than its factorization.

3665026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1832515.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 3665026 is about 1914.4257624677. The cubic root of 3665026 is about 154.1791640547.

The spelling of 3665026 in words is "three million, six hundred sixty-five thousand, twenty-six".