1666127 has 2 divisors, whose sum is σ = 1666128. Its totient is φ = 1666126.

The previous prime is 1666111. The next prime is 1666139. The reversal of 1666127 is 7216661.

It is a strong prime.

It is an emirp because it is prime and its reverse (7216661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1666127 - 2⁴ = 1666111 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1666127.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1666177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 833063 + 833064.

It is an arithmetic number, because the mean of its divisors is an integer number (833064).

2^1666127 is an apocalyptic number.

1666127 is a deficient number, since it is larger than the sum of its proper divisors (1).

1666127 is an equidigital number, since it uses as much as digits as its factorization.

It is an anagram of its base 8 representation: 1666127 = (6266117)₈.

1666127 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 29.

The square root of 1666127 is about 1290.7854198123. The cubic root of 1666127 is about 118.5503118565.

The spelling of 1666127 in words is "one million, six hundred sixty-six thousand, one hundred twenty-seven".