3665440663 has 2 divisors, whose sum is σ = 3665440664. Its totient is φ = 3665440662.

The previous prime is 3665440633. The next prime is 3665440673. The reversal of 3665440663 is 3660445663.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3665440663 - 2²¹ = 3663343511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3665440633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1832720331 + 1832720332.

It is an arithmetic number, because the mean of its divisors is an integer number (1832720332).

Almost surely, 2^3665440663 is an apocalyptic number.

3665440663 is a deficient number, since it is larger than the sum of its proper divisors (1).

3665440663 is an equidigital number, since it uses as much as digits as its factorization.

3665440663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 933120, while the sum is 43.

The square root of 3665440663 is about 60542.8828434854. The cubic root of 3665440663 is about 1541.8497847304.

The spelling of 3665440663 in words is "three billion, six hundred sixty-five million, four hundred forty thousand, six hundred sixty-three".