4021566725 has 12 divisors (see below), whose sum is σ = 5440083360. Its totient is φ = 2924775600.

The previous prime is 4021566707. The next prime is 4021566737. The reversal of 4021566725 is 5276651204.

4021566725 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4021566725 - 2⁸ = 4021566469 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7311665 + ... + 7312214.

It is an arithmetic number, because the mean of its divisors is an integer number (453340280).

Almost surely, 2^4021566725 is an apocalyptic number.

It is an amenable number.

4021566725 is a deficient number, since it is larger than the sum of its proper divisors (1418516635).

4021566725 is a wasteful number, since it uses less digits than its factorization.

4021566725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14623900 (or 14623895 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 4021566725 is about 63415.8239322017. The cubic root of 4021566725 is about 1590.2488600889.

The spelling of 4021566725 in words is "four billion, twenty-one million, five hundred sixty-six thousand, seven hundred twenty-five".