4066020640 has 96 divisors (see below), whose sum is σ = 10529870400. Its totient is φ = 1471411200.

The previous prime is 4066020601. The next prime is 4066020641. The reversal of 4066020640 is 460206604.

It is a junction number, because it is equal to n+sod(n) for n = 4066020599 and 4066020608.

It is not an unprimeable number, because it can be changed into a prime (4066020641) 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, 365886 + ... + 376834.

It is an arithmetic number, because the mean of its divisors is an integer number (109686150).

Almost surely, 2^4066020640 is an apocalyptic number.

4066020640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4066020640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5264935200).

4066020640 is an abundant number, since it is smaller than the sum of its proper divisors (6463849760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4066020640 is a wasteful number, since it uses less digits than its factorization.

4066020640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11186 (or 11178 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 4066020640 is about 63765.3561112929. The cubic root of 4066020640 is about 1596.0868749598.

The spelling of 4066020640 in words is "four billion, sixty-six million, twenty thousand, six hundred forty".