3663490081 has 4 divisors (see below), whose sum is σ = 3667037572. Its totient is φ = 3659942592.

The previous prime is 3663490057. The next prime is 3663490091. The reversal of 3663490081 is 1800943663.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1800943663 = 15461 ⋅116483.

It can be written as a sum of positive squares in 2 ways, for example, as 3305675025 + 357815056 = 57495^2 + 18916^2 .

It is a cyclic number.

It is not a de Polignac number, because 3663490081 - 2⁹ = 3663489569 is a prime.

It is a super-2 number, since 2×3663490081² = 26842319147170773122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3663490031) 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, 1772196 + ... + 1774261.

It is an arithmetic number, because the mean of its divisors is an integer number (916759393).

Almost surely, 2^3663490081 is an apocalyptic number.

It is an amenable number.

3663490081 is a deficient number, since it is larger than the sum of its proper divisors (3547491).

3663490081 is a wasteful number, since it uses less digits than its factorization.

3663490081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3547490.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 3663490081 is about 60526.7716056292. The cubic root of 3663490081 is about 1541.5762352579.

The spelling of 3663490081 in words is "three billion, six hundred sixty-three million, four hundred ninety thousand, eighty-one".