6646229169 has 16 divisors (see below), whose sum is σ = 9387472320. Its totient is φ = 4168156160.

The previous prime is 6646229153. The next prime is 6646229171. The reversal of 6646229169 is 9619226466.

It is a happy number.

6646229169 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 6646229169 - 2⁴ = 6646229153 is a prime.

It is a super-2 number, since 2×6646229169² = 88344724333732861122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6646229119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77974 + ... + 139184.

It is an arithmetic number, because the mean of its divisors is an integer number (586717020).

Almost surely, 2^6646229169 is an apocalyptic number.

It is an amenable number.

6646229169 is a deficient number, since it is larger than the sum of its proper divisors (2741243151).

6646229169 is a wasteful number, since it uses less digits than its factorization.

6646229169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63360.

The product of its digits is 1679616, while the sum is 51.

The square root of 6646229169 is about 81524.4084247166. The cubic root of 6646229169 is about 1880.1468469307.

The spelling of 6646229169 in words is "six billion, six hundred forty-six million, two hundred twenty-nine thousand, one hundred sixty-nine".