1666114547 has 2 divisors, whose sum is σ = 1666114548. Its totient is φ = 1666114546.

The previous prime is 1666114523. The next prime is 1666114559. The reversal of 1666114547 is 7454116661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1666114547 - 2¹² = 1666110451 is a prime.

It is not a weakly prime, because it can be changed into another prime (1666114517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 833057273 + 833057274.

It is an arithmetic number, because the mean of its divisors is an integer number (833057274).

Almost surely, 2^1666114547 is an apocalyptic number.

1666114547 is a deficient number, since it is larger than the sum of its proper divisors (1).

1666114547 is an equidigital number, since it uses as much as digits as its factorization.

1666114547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 41.

The square root of 1666114547 is about 40818.0664289724. The cubic root of 1666114547 is about 1185.5001649874.

It can be divided in two parts, 1666114 and 547, that added together give a palindrome (1666661).

The spelling of 1666114547 in words is "one billion, six hundred sixty-six million, one hundred fourteen thousand, five hundred forty-seven".