6556219669 has 4 divisors (see below), whose sum is σ = 6556834944. Its totient is φ = 6555604396.

The previous prime is 6556219639. The next prime is 6556219673. The reversal of 6556219669 is 9669126556.

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 a de Polignac number, because none of the positive numbers 2^k-6556219669 is a prime.

It is a super-2 number, since 2×6556219669² = 85968032696364939122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6556219619) 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, 291367 + ... + 313060.

It is an arithmetic number, because the mean of its divisors is an integer number (1639208736).

Almost surely, 2^6556219669 is an apocalyptic number.

It is an amenable number.

6556219669 is a deficient number, since it is larger than the sum of its proper divisors (615275).

6556219669 is a wasteful number, since it uses less digits than its factorization.

6556219669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615274.

The product of its digits is 5248800, while the sum is 55.

The square root of 6556219669 is about 80970.4864070854. The cubic root of 6556219669 is about 1871.6206668512.

The spelling of 6556219669 in words is "six billion, five hundred fifty-six million, two hundred nineteen thousand, six hundred sixty-nine".