13072666 has 16 divisors (see below), whose sum is σ = 20186208. Its totient is φ = 6346800.

The previous prime is 13072663. The next prime is 13072673. The reversal of 13072666 is 66627031.

It is not an unprimeable number, because it can be changed into a prime (13072663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9481 + ... + 10771.

It is an arithmetic number, because the mean of its divisors is an integer number (1261638).

Almost surely, 2^13072666 is an apocalyptic number.

13072666 is a deficient number, since it is larger than the sum of its proper divisors (7113542).

13072666 is a wasteful number, since it uses less digits than its factorization.

13072666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1437.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 13072666 is about 3615.6141940202. The cubic root of 13072666 is about 235.5707629153.

Adding to 13072666 its reverse (66627031), we get a palindrome (79699697).

The spelling of 13072666 in words is "thirteen million, seventy-two thousand, six hundred sixty-six".