1065066661 has 2 divisors, whose sum is σ = 1065066662. Its totient is φ = 1065066660.

The previous prime is 1065066619. The next prime is 1065066701. The reversal of 1065066661 is 1666605601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 858138436 + 206928225 = 29294^2 + 14385^2 .

It is a cyclic number.

It is not a de Polignac number, because 1065066661 - 2¹³ = 1065058469 is a prime.

It is a super-2 number, since 2×1065066661² = 2268733984747377842, 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 1065066661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1065066601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 532533330 + 532533331.

It is an arithmetic number, because the mean of its divisors is an integer number (532533331).

Almost surely, 2^1065066661 is an apocalyptic number.

It is an amenable number.

1065066661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1065066661 is an equidigital number, since it uses as much as digits as its factorization.

1065066661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 1065066661 is about 32635.3590603811. The cubic root of 1065066661 is about 1021.2347794424.

The spelling of 1065066661 in words is "one billion, sixty-five million, sixty-six thousand, six hundred sixty-one".