2564066573 has 4 divisors (see below), whose sum is σ = 2588029920. Its totient is φ = 2540103228.

The previous prime is 2564066471. The next prime is 2564066597. The reversal of 2564066573 is 3756604652.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2564066573 - 2⁸ = 2564066317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564066173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11981513 + ... + 11981726.

It is an arithmetic number, because the mean of its divisors is an integer number (647007480).

Almost surely, 2^2564066573 is an apocalyptic number.

It is an amenable number.

2564066573 is a deficient number, since it is larger than the sum of its proper divisors (23963347).

2564066573 is a wasteful number, since it uses less digits than its factorization.

2564066573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23963346.

The product of its (nonzero) digits is 907200, while the sum is 44.

The square root of 2564066573 is about 50636.6129692735. The cubic root of 2564066573 is about 1368.7047222625.

The spelling of 2564066573 in words is "two billion, five hundred sixty-four million, sixty-six thousand, five hundred seventy-three".