1066643243 has 2 divisors, whose sum is σ = 1066643244. Its totient is φ = 1066643242.

The previous prime is 1066643213. The next prime is 1066643267. The reversal of 1066643243 is 3423466601.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1066643243 - 2⁸ = 1066642987 is a prime.

It is a super-2 number, since 2×1066643243² = 2275455615675114098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1066643213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 533321621 + 533321622.

It is an arithmetic number, because the mean of its divisors is an integer number (533321622).

Almost surely, 2^1066643243 is an apocalyptic number.

1066643243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1066643243 is an equidigital number, since it uses as much as digits as its factorization.

1066643243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 35.

The square root of 1066643243 is about 32659.5046349451. The cubic root of 1066643243 is about 1021.7384307297.

The spelling of 1066643243 in words is "one billion, sixty-six million, six hundred forty-three thousand, two hundred forty-three".