1066840693 has 2 divisors, whose sum is σ = 1066840694. Its totient is φ = 1066840692.

The previous prime is 1066840637. The next prime is 1066840711. The reversal of 1066840693 is 3960486601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 932813764 + 134026929 = 30542^2 + 11577^2 .

It is an emirp because it is prime and its reverse (3960486601) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1066840693 is a prime.

It is a super-2 number, since 2×1066840693² = 2276298128481440498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1066843693) 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, 533420346 + 533420347.

It is an arithmetic number, because the mean of its divisors is an integer number (533420347).

Almost surely, 2^1066840693 is an apocalyptic number.

It is an amenable number.

1066840693 is a deficient number, since it is larger than the sum of its proper divisors (1).

1066840693 is an equidigital number, since it uses as much as digits as its factorization.

1066840693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 1066840693 is about 32662.5273516916. The cubic root of 1066840693 is about 1021.8014726785.

The spelling of 1066840693 in words is "one billion, sixty-six million, eight hundred forty thousand, six hundred ninety-three".