1366442026 has 4 divisors (see below), whose sum is σ = 2049663042. Its totient is φ = 683221012.

The previous prime is 1366441987. The next prime is 1366442027. The reversal of 1366442026 is 6202446631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6202446631 = 12823 ⋅483697.

It can be written as a sum of positive squares in only one way, i.e., 1325032801 + 41409225 = 36401^2 + 6435^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1366441982 and 1366442000.

It is not an unprimeable number, because it can be changed into a prime (1366442027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 341610505 + ... + 341610508.

Almost surely, 2^1366442026 is an apocalyptic number.

1366442026 is a deficient number, since it is larger than the sum of its proper divisors (683221016).

1366442026 is an equidigital number, since it uses as much as digits as its factorization.

1366442026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683221015.

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 1366442026 is about 36965.4166214855. The cubic root of 1366442026 is about 1109.6782407493.

Adding to 1366442026 its reverse (6202446631), we get a palindrome (7568888657).

The spelling of 1366442026 in words is "one billion, three hundred sixty-six million, four hundred forty-two thousand, twenty-six".