1304540066 has 4 divisors (see below), whose sum is σ = 1956810102. Its totient is φ = 652270032.

The previous prime is 1304539997. The next prime is 1304540077. The reversal of 1304540066 is 6600454031.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6600454031 = 10979 ⋅601189.

It can be written as a sum of positive squares in only one way, i.e., 1188525625 + 116014441 = 34475^2 + 10771^2 .

It is a super-3 number, since 3×1304540066³ (a number of 28 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326135015 + ... + 326135018.

Almost surely, 2^1304540066 is an apocalyptic number.

1304540066 is a deficient number, since it is larger than the sum of its proper divisors (652270036).

1304540066 is an equidigital number, since it uses as much as digits as its factorization.

1304540066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652270035.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 1304540066 is about 36118.4172687564. The cubic root of 1304540066 is about 1092.6619186199.

Adding to 1304540066 its reverse (6600454031), we get a palindrome (7904994097).

The spelling of 1304540066 in words is "one billion, three hundred four million, five hundred forty thousand, sixty-six".