1338740566 has 4 divisors (see below), whose sum is σ = 2008110852. Its totient is φ = 669370282.

The previous prime is 1338740561. The next prime is 1338740567. The reversal of 1338740566 is 6650478331.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1338740561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334685140 + ... + 334685143.

It is an arithmetic number, because the mean of its divisors is an integer number (502027713).

Almost surely, 2^1338740566 is an apocalyptic number.

1338740566 is a deficient number, since it is larger than the sum of its proper divisors (669370286).

1338740566 is an equidigital number, since it uses as much as digits as its factorization.

1338740566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669370285.

The product of its (nonzero) digits is 362880, while the sum is 43.

The square root of 1338740566 is about 36588.8038339599. The cubic root of 1338740566 is about 1102.1282669266.

The spelling of 1338740566 in words is "one billion, three hundred thirty-eight million, seven hundred forty thousand, five hundred sixty-six".