3661217365 has 8 divisors (see below), whose sum is σ = 4731419448. Its totient is φ = 2703668160.

The previous prime is 3661217363. The next prime is 3661217383. The reversal of 3661217365 is 5637121663.

It can be written as a sum of positive squares in 4 ways, for example, as 686387601 + 2974829764 = 26199^2 + 54542^2 .

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

It is not a de Polignac number, because 3661217365 - 2¹ = 3661217363 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 (3661217363) 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, 28163146 + ... + 28163275.

It is an arithmetic number, because the mean of its divisors is an integer number (591427431).

Almost surely, 2^3661217365 is an apocalyptic number.

It is an amenable number.

3661217365 is a deficient number, since it is larger than the sum of its proper divisors (1070202083).

3661217365 is a wasteful number, since it uses less digits than its factorization.

3661217365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56326439.

The product of its digits is 136080, while the sum is 40.

The square root of 3661217365 is about 60507.9942239040. The cubic root of 3661217365 is about 1541.2573872333.

The spelling of 3661217365 in words is "three billion, six hundred sixty-one million, two hundred seventeen thousand, three hundred sixty-five".