1066643 has 2 divisors, whose sum is σ = 1066644. Its totient is φ = 1066642.

The previous prime is 1066621. The next prime is 1066651. The reversal of 1066643 is 3466601.

It is a strong prime.

It is an emirp because it is prime and its reverse (3466601) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1066643 - 2¹² = 1062547 is a prime.

It is a super-2 number, since 2×1066643² = 2275454578898, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1066693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 533321 + 533322.

It is an arithmetic number, because the mean of its divisors is an integer number (533322).

2^1066643 is an apocalyptic number.

1066643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1066643 is an equidigital number, since it uses as much as digits as its factorization.

1066643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 1066643 is about 1032.7841013494. The cubic root of 1066643 is about 102.1738353140.

The spelling of 1066643 in words is "one million, sixty-six thousand, six hundred forty-three".