6646225767 has 8 divisors (see below), whose sum is σ = 8862263424. Its totient is φ = 4430502648.

The previous prime is 6646225763. The next prime is 6646225777. The reversal of 6646225767 is 7675226466.

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 6646225767 - 2² = 6646225763 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6646225763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23883 + ... + 117740.

It is an arithmetic number, because the mean of its divisors is an integer number (1107782928).

Almost surely, 2^6646225767 is an apocalyptic number.

6646225767 is a deficient number, since it is larger than the sum of its proper divisors (2216037657).

6646225767 is a wasteful number, since it uses less digits than its factorization.

6646225767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157269.

The product of its digits is 5080320, while the sum is 51.

The square root of 6646225767 is about 81524.3875597971. The cubic root of 6646225767 is about 1880.1465261342.

It can be divided in two parts, 66462 and 25767, that added together give a palindrome (92229).

The spelling of 6646225767 in words is "six billion, six hundred forty-six million, two hundred twenty-five thousand, seven hundred sixty-seven".