3636661 has 4 divisors (see below), whose sum is σ = 4156192. Its totient is φ = 3117132.

The previous prime is 3636631. The next prime is 3636667. The reversal of 3636661 is 1666363.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3636661 is a prime.

It is a super-3 number, since 3×3636661³ (a number of 21 digits) contains 333 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 (3636667) 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, 259755 + ... + 259768.

It is an arithmetic number, because the mean of its divisors is an integer number (1039048).

Almost surely, 2^3636661 is an apocalyptic number.

It is an amenable number.

3636661 is a deficient number, since it is larger than the sum of its proper divisors (519531).

3636661 is an equidigital number, since it uses as much as digits as its factorization.

3636661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519530.

The product of its digits is 11664, while the sum is 31.

The square root of 3636661 is about 1907.0031463005. The cubic root of 3636661 is about 153.7803835342.

The spelling of 3636661 in words is "three million, six hundred thirty-six thousand, six hundred sixty-one".