3665331649 has 8 divisors (see below), whose sum is σ = 4189332608. Its totient is φ = 3141426240.

The previous prime is 3665331647. The next prime is 3665331689. The reversal of 3665331649 is 9461335663.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3665331649 - 2¹ = 3665331647 is a prime.

It is a super-2 number, since 2×3665331649² = 26869312194322118402, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3665331599 and 3665331608.

It is not an unprimeable number, because it can be changed into a prime (3665331641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103924 + ... + 134650.

It is an arithmetic number, because the mean of its divisors is an integer number (523666576).

Almost surely, 2^3665331649 is an apocalyptic number.

It is an amenable number.

3665331649 is a deficient number, since it is larger than the sum of its proper divisors (524000959).

3665331649 is a wasteful number, since it uses less digits than its factorization.

3665331649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47775.

The product of its digits is 1049760, while the sum is 46.

The square root of 3665331649 is about 60541.9825327846. The cubic root of 3665331649 is about 1541.8344991760.

The spelling of 3665331649 in words is "three billion, six hundred sixty-five million, three hundred thirty-one thousand, six hundred forty-nine".