1081966601 has 2 divisors, whose sum is σ = 1081966602. Its totient is φ = 1081966600.

The previous prime is 1081966579. The next prime is 1081966661. The reversal of 1081966601 is 1066691801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 912342025 + 169624576 = 30205^2 + 13024^2 .

It is a cyclic number.

It is not a de Polignac number, because 1081966601 - 2⁶ = 1081966537 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1081966661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540983300 + 540983301.

It is an arithmetic number, because the mean of its divisors is an integer number (540983301).

Almost surely, 2^1081966601 is an apocalyptic number.

It is an amenable number.

1081966601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081966601 is an equidigital number, since it uses as much as digits as its factorization.

1081966601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 1081966601 is about 32893.2607231329. The cubic root of 1081966601 is about 1026.6079386184.

The spelling of 1081966601 in words is "one billion, eighty-one million, nine hundred sixty-six thousand, six hundred one".