3665511481 has 2 divisors, whose sum is σ = 3665511482. Its totient is φ = 3665511480.

The previous prime is 3665511427. The next prime is 3665511589. The reversal of 3665511481 is 1841155663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3659161081 + 6350400 = 60491^2 + 2520^2 .

It is a cyclic number.

It is not a de Polignac number, because 3665511481 - 2¹⁷ = 3665380409 is a prime.

It is a super-2 number, since 2×3665511481² = 26871948834685626722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3665511401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1832755740 + 1832755741.

It is an arithmetic number, because the mean of its divisors is an integer number (1832755741).

Almost surely, 2^3665511481 is an apocalyptic number.

It is an amenable number.

3665511481 is a deficient number, since it is larger than the sum of its proper divisors (1).

3665511481 is an equidigital number, since it uses as much as digits as its factorization.

3665511481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 40.

The square root of 3665511481 is about 60543.4676988360. The cubic root of 3665511481 is about 1541.8597144156.

The spelling of 3665511481 in words is "three billion, six hundred sixty-five million, five hundred eleven thousand, four hundred eighty-one".