6628608137 has 8 divisors (see below), whose sum is σ = 6736096296. Its totient is φ = 6521976832.

The previous prime is 6628608121. The next prime is 6628608143. The reversal of 6628608137 is 7318068266.

It can be written as a sum of positive squares in 4 ways, for example, as 415385161 + 6213222976 = 20381^2 + 78824^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6628608137 - 2⁴ = 6628608121 is a prime.

It is a super-2 number, since 2×6628608137² = 87876891667805221538, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6628608091 and 6628608100.

It is not an unprimeable number, because it can be changed into a prime (6628608037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198608 + ... + 229569.

It is an arithmetic number, because the mean of its divisors is an integer number (842012037).

Almost surely, 2^6628608137 is an apocalyptic number.

It is an amenable number.

6628608137 is a deficient number, since it is larger than the sum of its proper divisors (107488159).

6628608137 is a wasteful number, since it uses less digits than its factorization.

6628608137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428427.

The product of its (nonzero) digits is 580608, while the sum is 47.

The square root of 6628608137 is about 81416.2645728727. The cubic root of 6628608137 is about 1878.4837760763.

The spelling of 6628608137 in words is "six billion, six hundred twenty-eight million, six hundred eight thousand, one hundred thirty-seven".