9666144913657 has 32 divisors (see below), whose sum is σ = 10452731756544. Its totient is φ = 8912470564800.

The previous prime is 9666144913631. The next prime is 9666144913699. The reversal of 9666144913657 is 7563194416669.

It is a cyclic number.

It is not a de Polignac number, because 9666144913657 - 2³⁵ = 9631785175289 is a prime.

It is a super-2 number, since 2×9666144913657² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9666144913592 and 9666144913601.

It is not an unprimeable number, because it can be changed into a prime (9666144913457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 342988107 + ... + 343016287.

It is an arithmetic number, because the mean of its divisors is an integer number (326647867392).

Almost surely, 2^{9666144913657} is an apocalyptic number.

It is an amenable number.

9666144913657 is a deficient number, since it is larger than the sum of its proper divisors (786586842887).

9666144913657 is a wasteful number, since it uses less digits than its factorization.

9666144913657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30109.

The product of its digits is 176359680, while the sum is 67.

The spelling of 9666144913657 in words is "nine trillion, six hundred sixty-six billion, one hundred forty-four million, nine hundred thirteen thousand, six hundred fifty-seven".