1166551611223 has 2 divisors, whose sum is σ = 1166551611224. Its totient is φ = 1166551611222.

The previous prime is 1166551611103. The next prime is 1166551611301. The reversal of 1166551611223 is 3221161556611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1166551611223 - 2³⁷ = 1029112657751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1166051611223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583275805611 + 583275805612.

It is an arithmetic number, because the mean of its divisors is an integer number (583275805612).

Almost surely, 2^{1166551611223} is an apocalyptic number.

1166551611223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166551611223 is an equidigital number, since it uses as much as digits as its factorization.

1166551611223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 40.

The spelling of 1166551611223 in words is "one trillion, one hundred sixty-six billion, five hundred fifty-one million, six hundred eleven thousand, two hundred twenty-three".