3668552557 has 4 divisors (see below), whose sum is σ = 3680125596. Its totient is φ = 3656979520.

The previous prime is 3668552549. The next prime is 3668552561. The reversal of 3668552557 is 7552558663.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7552558663 = 13 ⋅580966051.

It can be written as a sum of positive squares in 2 ways, for example, as 1149616836 + 2518935721 = 33906^2 + 50189^2 .

It is a cyclic number.

It is not a de Polignac number, because 3668552557 - 2³ = 3668552549 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 (3668552567) 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 3 ways as a sum of consecutive naturals, for example, 5786044 + ... + 5786677.

It is an arithmetic number, because the mean of its divisors is an integer number (920031399).

Almost surely, 2^3668552557 is an apocalyptic number.

It is an amenable number.

3668552557 is a deficient number, since it is larger than the sum of its proper divisors (11573039).

3668552557 is a wasteful number, since it uses less digits than its factorization.

3668552557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11573038.

The product of its digits is 7560000, while the sum is 52.

The square root of 3668552557 is about 60568.5773070492. The cubic root of 3668552557 is about 1542.2859956665.

The spelling of 3668552557 in words is "three billion, six hundred sixty-eight million, five hundred fifty-two thousand, five hundred fifty-seven".