9628665677 has 2 divisors, whose sum is σ = 9628665678. Its totient is φ = 9628665676.

The previous prime is 9628665667. The next prime is 9628665731. The reversal of 9628665677 is 7765668269.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8490885316 + 1137780361 = 92146^2 + 33731^2 .

It is an emirp because it is prime and its reverse (7765668269) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9628665677 - 2¹⁶ = 9628600141 is a prime.

It is a super-2 number, since 2×9628665677² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9628665667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4814332838 + 4814332839.

It is an arithmetic number, because the mean of its divisors is an integer number (4814332839).

Almost surely, 2^9628665677 is an apocalyptic number.

It is an amenable number.

9628665677 is a deficient number, since it is larger than the sum of its proper divisors (1).

9628665677 is an equidigital number, since it uses as much as digits as its factorization.

9628665677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45722880, while the sum is 62.

The square root of 9628665677 is about 98125.7645931995. The cubic root of 9628665677 is about 2127.4304409867.

The spelling of 9628665677 in words is "nine billion, six hundred twenty-eight million, six hundred sixty-five thousand, six hundred seventy-seven".