1066855117 has 2 divisors, whose sum is σ = 1066855118. Its totient is φ = 1066855116.

The previous prime is 1066855067. The next prime is 1066855123. The reversal of 1066855117 is 7115586601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 980253481 + 86601636 = 31309^2 + 9306^2 .

It is a cyclic number.

It is not a de Polignac number, because 1066855117 - 2¹¹ = 1066853069 is a prime.

It is a super-2 number, since 2×1066855117² = 2276359681338167378, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1066855117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1066855147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 533427558 + 533427559.

It is an arithmetic number, because the mean of its divisors is an integer number (533427559).

Almost surely, 2^1066855117 is an apocalyptic number.

It is an amenable number.

1066855117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1066855117 is an equidigital number, since it uses as much as digits as its factorization.

1066855117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 40.

The square root of 1066855117 is about 32662.7481544343. The cubic root of 1066855117 is about 1021.8060776765.

The spelling of 1066855117 in words is "one billion, sixty-six million, eight hundred fifty-five thousand, one hundred seventeen".