3661916617 has 4 divisors (see below), whose sum is σ = 3662094100. Its totient is φ = 3661739136.

The previous prime is 3661916581. The next prime is 3661916639. The reversal of 3661916617 is 7166191663.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7166191663 = 31 ⋅231167473.

It can be written as a sum of positive squares in 2 ways, for example, as 2734348681 + 927567936 = 52291^2 + 30456^2 .

It is a cyclic number.

It is not a de Polignac number, because 3661916617 - 2¹¹ = 3661914569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3661916017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52992 + ... + 100657.

It is an arithmetic number, because the mean of its divisors is an integer number (915523525).

Almost surely, 2^3661916617 is an apocalyptic number.

It is an amenable number.

3661916617 is a deficient number, since it is larger than the sum of its proper divisors (177483).

3661916617 is a wasteful number, since it uses less digits than its factorization.

3661916617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177482.

The product of its digits is 244944, while the sum is 46.

The square root of 3661916617 is about 60513.7721266820. The cubic root of 3661916617 is about 1541.3555020222.

The spelling of 3661916617 in words is "three billion, six hundred sixty-one million, nine hundred sixteen thousand, six hundred seventeen".