3664615 has 4 divisors (see below), whose sum is σ = 4397544. Its totient is φ = 2931688.

The previous prime is 3664561. The next prime is 3664631. The reversal of 3664615 is 5164663.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5164663 = 7 ⋅737809.

It is a cyclic number.

It is not a de Polignac number, because 3664615 - 2⁷ = 3664487 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 366457 + ... + 366466.

It is an arithmetic number, because the mean of its divisors is an integer number (1099386).

Almost surely, 2^3664615 is an apocalyptic number.

3664615 is a deficient number, since it is larger than the sum of its proper divisors (732929).

3664615 is an equidigital number, since it uses as much as digits as its factorization.

3664615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732928.

The product of its digits is 12960, while the sum is 31.

The square root of 3664615 is about 1914.3184165650. The cubic root of 3664615 is about 154.1734005662.

The spelling of 3664615 in words is "three million, six hundred sixty-four thousand, six hundred fifteen".