9665657 has 2 divisors, whose sum is σ = 9665658. Its totient is φ = 9665656.

The previous prime is 9665653. The next prime is 9665701. The reversal of 9665657 is 7565669.

It is an a-pointer prime, because the next prime (9665701) can be obtained adding 9665657 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9369721 + 295936 = 3061^2 + 544^2 .

It is an emirp because it is prime and its reverse (7565669) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9665657 - 2² = 9665653 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9665653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4832828 + 4832829.

It is an arithmetic number, because the mean of its divisors is an integer number (4832829).

Almost surely, 2^9665657 is an apocalyptic number.

It is an amenable number.

9665657 is a deficient number, since it is larger than the sum of its proper divisors (1).

9665657 is an equidigital number, since it uses as much as digits as its factorization.

9665657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 340200, while the sum is 44.

The square root of 9665657 is about 3108.9639753461. The cubic root of 9665657 is about 213.0151340757.

The spelling of 9665657 in words is "nine million, six hundred sixty-five thousand, six hundred fifty-seven".