1066046381 has 2 divisors, whose sum is σ = 1066046382. Its totient is φ = 1066046380.

The previous prime is 1066046363. The next prime is 1066046437. The reversal of 1066046381 is 1836406601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1036518025 + 29528356 = 32195^2 + 5434^2 .

It is a cyclic number.

It is not a de Polignac number, because 1066046381 - 2²⁶ = 998937517 is a prime.

It is a super-2 number, since 2×1066046381² = 2272909772886394322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1066046341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 533023190 + 533023191.

It is an arithmetic number, because the mean of its divisors is an integer number (533023191).

Almost surely, 2^1066046381 is an apocalyptic number.

It is an amenable number.

1066046381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1066046381 is an equidigital number, since it uses as much as digits as its factorization.

1066046381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 1066046381 is about 32650.3657100499. The cubic root of 1066046381 is about 1021.5478169728.

The spelling of 1066046381 in words is "one billion, sixty-six million, forty-six thousand, three hundred eighty-one".