3666603686 has 16 divisors (see below), whose sum is σ = 5564168736. Its totient is φ = 1811932416.

The previous prime is 3666603683. The next prime is 3666603691. The reversal of 3666603686 is 6863066663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3666603683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134375 + ... + 159341.

It is an arithmetic number, because the mean of its divisors is an integer number (347760546).

Almost surely, 2^3666603686 is an apocalyptic number.

3666603686 is a deficient number, since it is larger than the sum of its proper divisors (1897565050).

3666603686 is a wasteful number, since it uses less digits than its factorization.

3666603686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25823.

The product of its (nonzero) digits is 3359232, while the sum is 50.

The square root of 3666603686 is about 60552.4870339774. The cubic root of 3666603686 is about 1542.0128408086.

The spelling of 3666603686 in words is "three billion, six hundred sixty-six million, six hundred three thousand, six hundred eighty-six".