6628345705 has 24 divisors (see below), whose sum is σ = 8373118104. Its totient is φ = 5035699200.

The previous prime is 6628345697. The next prime is 6628345727. The reversal of 6628345705 is 5075438266.

It can be written as a sum of positive squares in 12 ways, for example, as 3822206976 + 2806138729 = 61824^2 + 52973^2 .

It is not a de Polignac number, because 6628345705 - 2³ = 6628345697 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 243585 + ... + 269425.

It is an arithmetic number, because the mean of its divisors is an integer number (348879921).

Almost surely, 2^6628345705 is an apocalyptic number.

It is an amenable number.

6628345705 is a deficient number, since it is larger than the sum of its proper divisors (1744772399).

6628345705 is a wasteful number, since it uses less digits than its factorization.

6628345705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25965 (or 25936 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 46.

The square root of 6628345705 is about 81414.6528887767. The cubic root of 6628345705 is about 1878.4589855145.

The spelling of 6628345705 in words is "six billion, six hundred twenty-eight million, three hundred forty-five thousand, seven hundred five".