3660355649 has 4 divisors (see below), whose sum is σ = 3660679764. Its totient is φ = 3660031536.

The previous prime is 3660355639. The next prime is 3660355679. The reversal of 3660355649 is 9465530663.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9465530663 = 197 ⋅48048379.

It can be written as a sum of positive squares in 2 ways, for example, as 759994624 + 2900361025 = 27568^2 + 53855^2 .

It is a cyclic number.

It is not a de Polignac number, because 3660355649 - 2¹² = 3660351553 is a prime.

It is a super-2 number, since 2×3660355649² = 26796406954332422402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3660355609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144482 + ... + 167915.

It is an arithmetic number, because the mean of its divisors is an integer number (915169941).

Almost surely, 2^3660355649 is an apocalyptic number.

It is an amenable number.

3660355649 is a deficient number, since it is larger than the sum of its proper divisors (324115).

3660355649 is a wasteful number, since it uses less digits than its factorization.

3660355649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324114.

The product of its (nonzero) digits is 1749600, while the sum is 47.

The square root of 3660355649 is about 60500.8731259310. The cubic root of 3660355649 is about 1541.1364592987.

The spelling of 3660355649 in words is "three billion, six hundred sixty million, three hundred fifty-five thousand, six hundred forty-nine".