4007021216665 has 8 divisors (see below), whose sum is σ = 4811051590848. Its totient is φ = 3203866219440.

The previous prime is 4007021216617. The next prime is 4007021216669. The reversal of 4007021216665 is 5666121207004.

It is a happy number.

4007021216665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4007021216665 - 2³⁹ = 3457265402777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4007021216669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218834167 + ... + 218852476.

It is an arithmetic number, because the mean of its divisors is an integer number (601381448856).

Almost surely, 2^{4007021216665} is an apocalyptic number.

It is an amenable number.

4007021216665 is a deficient number, since it is larger than the sum of its proper divisors (804030374183).

4007021216665 is a wasteful number, since it uses less digits than its factorization.

4007021216665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437688479.

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 4007021216665 in words is "four trillion, seven billion, twenty-one million, two hundred sixteen thousand, six hundred sixty-five".