61000665105551 has 2 divisors, whose sum is σ = 61000665105552. Its totient is φ = 61000665105550.

The previous prime is 61000665105521. The next prime is 61000665105563. The reversal of 61000665105551 is 15550156600016.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61000665105551 - 2¹⁰ = 61000665104527 is a prime.

It is a super-2 number, since 2×61000665105551² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61000665105499 and 61000665105508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61000665105521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30500332552775 + 30500332552776.

It is an arithmetic number, because the mean of its divisors is an integer number (30500332552776).

Almost surely, 2^{61000665105551} is an apocalyptic number.

61000665105551 is a deficient number, since it is larger than the sum of its proper divisors (1).

61000665105551 is an equidigital number, since it uses as much as digits as its factorization.

61000665105551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 135000, while the sum is 41.

The spelling of 61000665105551 in words is "sixty-one trillion, six hundred sixty-five million, one hundred five thousand, five hundred fifty-one".