4006432665 has 16 divisors (see below), whose sum is σ = 7122547200. Its totient is φ = 2136764016.

The previous prime is 4006432649. The next prime is 4006432673. The reversal of 4006432665 is 5662346004.

4006432665 is a `hidden beast` number, since 4 + 0 + 0 + 643 + 2 + 6 + 6 + 5 = 666.

It is not a de Polignac number, because 4006432665 - 2⁴ = 4006432649 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14838505 + ... + 14838774.

It is an arithmetic number, because the mean of its divisors is an integer number (445159200).

Almost surely, 2^4006432665 is an apocalyptic number.

4006432665 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4006432665 is a deficient number, since it is larger than the sum of its proper divisors (3116114535).

4006432665 is a wasteful number, since it uses less digits than its factorization.

4006432665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29677293 (or 29677287 counting only the distinct ones).

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

The square root of 4006432665 is about 63296.3874561574. The cubic root of 4006432665 is about 1588.2515311593.

Adding to 4006432665 its reverse (5662346004), we get a palindrome (9668778669).

The spelling of 4006432665 in words is "four billion, six million, four hundred thirty-two thousand, six hundred sixty-five".