11660610655657 has 2 divisors, whose sum is σ = 11660610655658. Its totient is φ = 11660610655656.

The previous prime is 11660610655619. The next prime is 11660610655711. The reversal of 11660610655657 is 75655601606611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7117642387881 + 4542968267776 = 2667891^2 + 2131424^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11660610655657 is a prime.

It is a super-2 number, since 2×11660610655657² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11660610655598 and 11660610655607.

It is not a weakly prime, because it can be changed into another prime (11660610655357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5830305327828 + 5830305327829.

It is an arithmetic number, because the mean of its divisors is an integer number (5830305327829).

Almost surely, 2^{11660610655657} is an apocalyptic number.

It is an amenable number.

11660610655657 is a deficient number, since it is larger than the sum of its proper divisors (1).

11660610655657 is an equidigital number, since it uses as much as digits as its factorization.

11660610655657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804000, while the sum is 55.

The spelling of 11660610655657 in words is "eleven trillion, six hundred sixty billion, six hundred ten million, six hundred fifty-five thousand, six hundred fifty-seven".