6656722593 has 4 divisors (see below), whose sum is σ = 8875630128. Its totient is φ = 4437815060.

The previous prime is 6656722573. The next prime is 6656722601. The reversal of 6656722593 is 3952276566.

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 6656722593 - 2⁶ = 6656722529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6656722573) 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, 1109453763 + ... + 1109453768.

It is an arithmetic number, because the mean of its divisors is an integer number (2218907532).

Almost surely, 2^6656722593 is an apocalyptic number.

It is an amenable number.

6656722593 is a deficient number, since it is larger than the sum of its proper divisors (2218907535).

6656722593 is a wasteful number, since it uses less digits than its factorization.

6656722593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2218907534.

The product of its digits is 4082400, while the sum is 51.

The square root of 6656722593 is about 81588.7406018747. The cubic root of 6656722593 is about 1881.1358189468.

The spelling of 6656722593 in words is "six billion, six hundred fifty-six million, seven hundred twenty-two thousand, five hundred ninety-three".