3663994925 has 6 divisors (see below), whose sum is σ = 4543353738. Its totient is φ = 2931195920.

The previous prime is 3663994913. The next prime is 3663994927. The reversal of 3663994925 is 5294993663.

It can be written as a sum of positive squares in 3 ways, for example, as 153313924 + 3510681001 = 12382^2 + 59251^2 .

It is not a de Polignac number, because 3663994925 - 2⁴ = 3663994909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3663994927) 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 5 ways as a sum of consecutive naturals, for example, 73279874 + ... + 73279923.

It is an arithmetic number, because the mean of its divisors is an integer number (757225623).

Almost surely, 2^3663994925 is an apocalyptic number.

It is an amenable number.

3663994925 is a deficient number, since it is larger than the sum of its proper divisors (879358813).

3663994925 is a wasteful number, since it uses less digits than its factorization.

3663994925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146559807 (or 146559802 counting only the distinct ones).

The product of its digits is 9447840, while the sum is 56.

The square root of 3663994925 is about 60530.9418809917. The cubic root of 3663994925 is about 1541.6470438538.

The spelling of 3663994925 in words is "three billion, six hundred sixty-three million, nine hundred ninety-four thousand, nine hundred twenty-five".