1066612013 has 4 divisors (see below), whose sum is σ = 1066694460. Its totient is φ = 1066529568.

The previous prime is 1066611989. The next prime is 1066612021. The reversal of 1066612013 is 3102166601.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 693426889 + 373185124 = 26333^2 + 19318^2 .

It is a cyclic number.

It is not a de Polignac number, because 1066612013 - 2²⁶ = 999503149 is a prime.

It is a super-2 number, since 2×1066612013² = 2275322372551824338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066612073) 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, 17120 + ... + 49257.

It is an arithmetic number, because the mean of its divisors is an integer number (266673615).

Almost surely, 2^1066612013 is an apocalyptic number.

It is an amenable number.

1066612013 is a deficient number, since it is larger than the sum of its proper divisors (82447).

1066612013 is an equidigital number, since it uses as much as digits as its factorization.

1066612013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82446.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1066612013 is about 32659.0265164166. The cubic root of 1066612013 is about 1021.7284588849.

Adding to 1066612013 its reverse (3102166601), we get a palindrome (4168778614).

The spelling of 1066612013 in words is "one billion, sixty-six million, six hundred twelve thousand, thirteen".