3665331647 has 2 divisors, whose sum is σ = 3665331648. Its totient is φ = 3665331646.

The previous prime is 3665331643. The next prime is 3665331689. The reversal of 3665331647 is 7461335663.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3665331647 - 2² = 3665331643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3665331598 and 3665331607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3665331641) 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 as a sum of consecutive naturals, namely, 1832665823 + 1832665824.

It is an arithmetic number, because the mean of its divisors is an integer number (1832665824).

Almost surely, 2^3665331647 is an apocalyptic number.

3665331647 is a deficient number, since it is larger than the sum of its proper divisors (1).

3665331647 is an equidigital number, since it uses as much as digits as its factorization.

3665331647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 44.

The square root of 3665331647 is about 60541.9825162672. The cubic root of 3665331647 is about 1541.8344988955.

The spelling of 3665331647 in words is "three billion, six hundred sixty-five million, three hundred thirty-one thousand, six hundred forty-seven".