1066645417 has 2 divisors, whose sum is σ = 1066645418. Its totient is φ = 1066645416.

The previous prime is 1066645409. The next prime is 1066645423. The reversal of 1066645417 is 7145466601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1050797056 + 15848361 = 32416^2 + 3981^2 .

It is a cyclic number.

It is not a de Polignac number, because 1066645417 - 2³ = 1066645409 is a prime.

It is a super-2 number, since 2×1066645417² = 2275464891214207778, 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 1066645417.

It is not a weakly prime, because it can be changed into another prime (1066645477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 533322708 + 533322709.

It is an arithmetic number, because the mean of its divisors is an integer number (533322709).

Almost surely, 2^1066645417 is an apocalyptic number.

It is an amenable number.

1066645417 is a deficient number, since it is larger than the sum of its proper divisors (1).

1066645417 is an equidigital number, since it uses as much as digits as its factorization.

1066645417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 1066645417 is about 32659.5379177355. The cubic root of 1066645417 is about 1021.7391248880.

The spelling of 1066645417 in words is "one billion, sixty-six million, six hundred forty-five thousand, four hundred seventeen".