3665665105 has 8 divisors (see below), whose sum is σ = 4550481000. Its totient is φ = 2831410176.

The previous prime is 3665665097. The next prime is 3665665111. The reversal of 3665665105 is 5015665663.

It can be written as a sum of positive squares in 4 ways, for example, as 737448336 + 2928216769 = 27156^2 + 54113^2 .

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 3665665105 - 2³ = 3665665097 is a prime.

It is a super-2 number, since 2×3665665105² = 26874201324029322050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12640080 + ... + 12640369.

It is an arithmetic number, because the mean of its divisors is an integer number (568810125).

Almost surely, 2^3665665105 is an apocalyptic number.

It is an amenable number.

3665665105 is a deficient number, since it is larger than the sum of its proper divisors (884815895).

3665665105 is a wasteful number, since it uses less digits than its factorization.

3665665105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25280483.

The product of its (nonzero) digits is 486000, while the sum is 43.

The square root of 3665665105 is about 60544.7363938435. The cubic root of 3665665105 is about 1541.8812542333.

It can be divided in two parts, 36656 and 65105, that added together give a square (101761 = 319²).

The spelling of 3665665105 in words is "three billion, six hundred sixty-five million, six hundred sixty-five thousand, one hundred five".