1066126513 has 4 divisors (see below), whose sum is σ = 1072289268. Its totient is φ = 1059963760.

The previous prime is 1066126511. The next prime is 1066126517. The reversal of 1066126513 is 3156216601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3156216601 = 2953 ⋅1068817.

It can be written as a sum of positive squares in 2 ways, for example, as 648619024 + 417507489 = 25468^2 + 20433^2 .

It is a cyclic number.

It is not a de Polignac number, because 1066126513 - 2¹ = 1066126511 is a prime.

It is a super-2 number, since 2×1066126513² = 2273251483443078338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1066126511) 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, 3081118 + ... + 3081463.

It is an arithmetic number, because the mean of its divisors is an integer number (268072317).

Almost surely, 2^1066126513 is an apocalyptic number.

It is an amenable number.

1066126513 is a deficient number, since it is larger than the sum of its proper divisors (6162755).

1066126513 is an equidigital number, since it uses as much as digits as its factorization.

1066126513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6162754.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 1066126513 is about 32651.5928095399. The cubic root of 1066126513 is about 1021.5734120501.

The spelling of 1066126513 in words is "one billion, sixty-six million, one hundred twenty-six thousand, five hundred thirteen".