1066681457 has 4 divisors (see below), whose sum is σ = 1068872256. Its totient is φ = 1064490660.

The previous prime is 1066681453. The next prime is 1066681487. The reversal of 1066681457 is 7541866601.

1066681457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7541866601 = 863 ⋅8739127.

It is a cyclic number.

It is not a de Polignac number, because 1066681457 - 2² = 1066681453 is a prime.

It is a super-2 number, since 2×1066681457² = 2275618661415285698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1066681453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1094669 + ... + 1095642.

It is an arithmetic number, because the mean of its divisors is an integer number (267218064).

Almost surely, 2^1066681457 is an apocalyptic number.

It is an amenable number.

1066681457 is a deficient number, since it is larger than the sum of its proper divisors (2190799).

1066681457 is an equidigital number, since it uses as much as digits as its factorization.

1066681457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2190798.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 1066681457 is about 32660.0896661353. The cubic root of 1066681457 is about 1021.7506323246.

The spelling of 1066681457 in words is "one billion, sixty-six million, six hundred eighty-one thousand, four hundred fifty-seven".