3656675749 has 2 divisors, whose sum is σ = 3656675750. Its totient is φ = 3656675748.

The previous prime is 3656675747. The next prime is 3656675779. The reversal of 3656675749 is 9475766563.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2950445124 + 706230625 = 54318^2 + 26575^2 .

It is a cyclic number.

It is not a de Polignac number, because 3656675749 - 2¹ = 3656675747 is a prime.

It is a super-2 number, since 2×3656675749² = 26742555066649422002, which contains 22 as substring.

Together with 3656675747, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 3656675693 and 3656675702.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3656675747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1828337874 + 1828337875.

It is an arithmetic number, because the mean of its divisors is an integer number (1828337875).

Almost surely, 2^3656675749 is an apocalyptic number.

It is an amenable number.

3656675749 is a deficient number, since it is larger than the sum of its proper divisors (1).

3656675749 is an equidigital number, since it uses as much as digits as its factorization.

3656675749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28576800, while the sum is 58.

The square root of 3656675749 is about 60470.4535207071. The cubic root of 3656675749 is about 1540.6198310285.

The spelling of 3656675749 in words is "three billion, six hundred fifty-six million, six hundred seventy-five thousand, seven hundred forty-nine".