1066640041 has 2 divisors, whose sum is σ = 1066640042. Its totient is φ = 1066640040.

The previous prime is 1066640023. The next prime is 1066640143. The reversal of 1066640041 is 1400466601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 901260441 + 165379600 = 30021^2 + 12860^2 .

It is a cyclic number.

It is not a de Polignac number, because 1066640041 - 2⁵ = 1066640009 is a prime.

It is a super-2 number, since 2×1066640041² = 2275441954128963362, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1066639991 and 1066640009.

It is not a weakly prime, because it can be changed into another prime (1066643041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 533320020 + 533320021.

It is an arithmetic number, because the mean of its divisors is an integer number (533320021).

Almost surely, 2^1066640041 is an apocalyptic number.

It is an amenable number.

1066640041 is a deficient number, since it is larger than the sum of its proper divisors (1).

1066640041 is an equidigital number, since it uses as much as digits as its factorization.

1066640041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 1066640041 is about 32659.4556139566. The cubic root of 1066640041 is about 1021.7374083292.

The spelling of 1066640041 in words is "one billion, sixty-six million, six hundred forty thousand, forty-one".