1166551616551 has 2 divisors, whose sum is σ = 1166551616552. Its totient is φ = 1166551616550.

The previous prime is 1166551616513. The next prime is 1166551616591. The reversal of 1166551616551 is 1556161556611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1166551616551 - 2⁹ = 1166551616039 is a prime.

It is a super-3 number, since 3×1166551616551³ (a number of 37 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1166551616495 and 1166551616504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1166551616591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583275808275 + 583275808276.

It is an arithmetic number, because the mean of its divisors is an integer number (583275808276).

Almost surely, 2^{1166551616551} is an apocalyptic number.

1166551616551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166551616551 is an equidigital number, since it uses as much as digits as its factorization.

1166551616551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 810000, while the sum is 49.

The spelling of 1166551616551 in words is "one trillion, one hundred sixty-six billion, five hundred fifty-one million, six hundred sixteen thousand, five hundred fifty-one".