6657223785 has 8 divisors (see below), whose sum is σ = 10651558080. Its totient is φ = 3550519344.

The previous prime is 6657223777. The next prime is 6657223813. The reversal of 6657223785 is 5873227566.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6657223785 - 2³ = 6657223777 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221907445 + ... + 221907474.

It is an arithmetic number, because the mean of its divisors is an integer number (1331444760).

Almost surely, 2^6657223785 is an apocalyptic number.

It is an amenable number.

6657223785 is a deficient number, since it is larger than the sum of its proper divisors (3994334295).

6657223785 is a wasteful number, since it uses less digits than its factorization.

6657223785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443814927.

The product of its digits is 4233600, while the sum is 51.

The square root of 6657223785 is about 81591.8119972832. The cubic root of 6657223785 is about 1881.1830286935.

The spelling of 6657223785 in words is "six billion, six hundred fifty-seven million, two hundred twenty-three thousand, seven hundred eighty-five".