61065660065553 has 128 divisors (see below), whose sum is σ = 106688750837760. Its totient is φ = 34032536778240.

The previous prime is 61065660065551. The next prime is 61065660065563. The reversal of 61065660065553 is 35556006656016.

61065660065553 is a `hidden beast` number, since 6 + 10 + 6 + 566 + 0 + 0 + 65 + 5 + 5 + 3 = 666.

It is not a de Polignac number, because 61065660065553 - 2¹ = 61065660065551 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61065660065553.

It is not an unprimeable number, because it can be changed into a prime (61065660065551) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2082218776 + ... + 2082248102.

It is an arithmetic number, because the mean of its divisors is an integer number (833505865920).

Almost surely, 2^{61065660065553} is an apocalyptic number.

It is an amenable number.

61065660065553 is a deficient number, since it is larger than the sum of its proper divisors (45623090772207).

61065660065553 is a wasteful number, since it uses less digits than its factorization.

61065660065553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31396 (or 31390 counting only the distinct ones).

The product of its (nonzero) digits is 14580000, while the sum is 54.

The spelling of 61065660065553 in words is "sixty-one trillion, sixty-five billion, six hundred sixty million, sixty-five thousand, five hundred fifty-three".