61061660551687 has 2 divisors, whose sum is σ = 61061660551688. Its totient is φ = 61061660551686.

The previous prime is 61061660551673. The next prime is 61061660551729. The reversal of 61061660551687 is 78615506616016.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61061660551687 - 2¹¹ = 61061660549639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61061660551637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30530830275843 + 30530830275844.

It is an arithmetic number, because the mean of its divisors is an integer number (30530830275844).

Almost surely, 2^{61061660551687} is an apocalyptic number.

61061660551687 is a deficient number, since it is larger than the sum of its proper divisors (1).

61061660551687 is an equidigital number, since it uses as much as digits as its factorization.

61061660551687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10886400, while the sum is 58.

The spelling of 61061660551687 in words is "sixty-one trillion, sixty-one billion, six hundred sixty million, five hundred fifty-one thousand, six hundred eighty-seven".