4020664641 has 16 divisors (see below), whose sum is σ = 6242327424. Its totient is φ = 2254172544.

The previous prime is 4020664619. The next prime is 4020664649. The reversal of 4020664641 is 1464660204.

It is not a de Polignac number, because 4020664641 - 2¹¹ = 4020662593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4020664649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1805116 + ... + 1807341.

It is an arithmetic number, because the mean of its divisors is an integer number (390145464).

Almost surely, 2^4020664641 is an apocalyptic number.

It is an amenable number.

4020664641 is a deficient number, since it is larger than the sum of its proper divisors (2221662783).

4020664641 is a wasteful number, since it uses less digits than its factorization.

4020664641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3612520.

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 4020664641 is about 63408.7110813648. The cubic root of 4020664641 is about 1590.1299474506.

The spelling of 4020664641 in words is "four billion, twenty million, six hundred sixty-four thousand, six hundred forty-one".