6555717897 has 4 divisors (see below), whose sum is σ = 8740957200. Its totient is φ = 4370478596.

The previous prime is 6555717863. The next prime is 6555717947. The reversal of 6555717897 is 7987175556.

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 6555717897 - 2¹⁰ = 6555716873 is a prime.

It is a super-2 number, since 2×6555717897² = 85954874290092205218, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6555717897.

It is not an unprimeable number, because it can be changed into a prime (6555717197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1092619647 + ... + 1092619652.

It is an arithmetic number, because the mean of its divisors is an integer number (2185239300).

Almost surely, 2^6555717897 is an apocalyptic number.

It is an amenable number.

6555717897 is a deficient number, since it is larger than the sum of its proper divisors (2185239303).

6555717897 is a wasteful number, since it uses less digits than its factorization.

6555717897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2185239302.

The product of its digits is 18522000, while the sum is 60.

The square root of 6555717897 is about 80967.3878607924. The cubic root of 6555717897 is about 1871.5729182576.

The spelling of 6555717897 in words is "six billion, five hundred fifty-five million, seven hundred seventeen thousand, eight hundred ninety-seven".