3666591747 has 144 divisors (see below), whose sum is σ = 7163039520. Its totient is φ = 1785369600.

The previous prime is 3666591703. The next prime is 3666591751. The reversal of 3666591747 is 7471956663.

It is a happy number.

It is not a de Polignac number, because 3666591747 - 2¹⁸ = 3666329603 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3666591693 and 3666591702.

It is not an unprimeable number, because it can be changed into a prime (3666591767) 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 143 ways as a sum of consecutive naturals, for example, 4465597 + ... + 4466417.

It is an arithmetic number, because the mean of its divisors is an integer number (49743330).

Almost surely, 2^3666591747 is an apocalyptic number.

3666591747 is a deficient number, since it is larger than the sum of its proper divisors (3496447773).

3666591747 is a wasteful number, since it uses less digits than its factorization.

3666591747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914 (or 904 counting only the distinct ones).

The product of its digits is 5715360, while the sum is 54.

The square root of 3666591747 is about 60552.3884500025. The cubic root of 3666591747 is about 1542.0111671334.

The spelling of 3666591747 in words is "three billion, six hundred sixty-six million, five hundred ninety-one thousand, seven hundred forty-seven".