4066542521 has 8 divisors (see below), whose sum is σ = 4244889600. Its totient is φ = 3891143520.

The previous prime is 4066542499. The next prime is 4066542523. The reversal of 4066542521 is 1252456604.

4066542521 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 a cyclic number.

It is not a de Polignac number, because 4066542521 - 2¹⁰ = 4066541497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4066542523) 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, 734201 + ... + 739718.

It is an arithmetic number, because the mean of its divisors is an integer number (530611200).

Almost surely, 2^4066542521 is an apocalyptic number.

It is an amenable number.

4066542521 is a deficient number, since it is larger than the sum of its proper divisors (178347079).

4066542521 is a wasteful number, since it uses less digits than its factorization.

4066542521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1474039.

The product of its (nonzero) digits is 57600, while the sum is 35.

The square root of 4066542521 is about 63769.4481785753. The cubic root of 4066542521 is about 1596.1551589040.

The spelling of 4066542521 in words is "four billion, sixty-six million, five hundred forty-two thousand, five hundred twenty-one".