4036420665 has 24 divisors (see below), whose sum is σ = 7031992968. Its totient is φ = 2141825280.

The previous prime is 4036420543. The next prime is 4036420697. The reversal of 4036420665 is 5660246304.

4036420665 is a `hidden beast` number, since 4 + 0 + 3 + 642 + 0 + 6 + 6 + 5 = 666.

4036420665 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 432099369 + 3604321296 = 20787^2 + 60036^2 .

It is not a de Polignac number, because 4036420665 - 2⁹ = 4036420153 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 218796 + ... + 236525.

It is an arithmetic number, because the mean of its divisors is an integer number (292999707).

Almost surely, 2^4036420665 is an apocalyptic number.

4036420665 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4036420665 is a deficient number, since it is larger than the sum of its proper divisors (2995572303).

4036420665 is a wasteful number, since it uses less digits than its factorization.

4036420665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455529 (or 455526 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The square root of 4036420665 is about 63532.8313944845. The cubic root of 4036420665 is about 1592.2043532077.

Adding to 4036420665 its reverse (5660246304), we get a palindrome (9696666969).

The spelling of 4036420665 in words is "four billion, thirty-six million, four hundred twenty thousand, six hundred sixty-five".