66124440010 has 16 divisors (see below), whose sum is σ = 119093668200. Its totient is φ = 26434292416.

The previous prime is 66124439959. The next prime is 66124440029. The reversal of 66124440010 is 1004442166.

It can be written as a sum of positive squares in 4 ways, for example, as 62249751001 + 3874689009 = 249499^2 + 62247^2 .

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 1917505 + ... + 1951684.

Almost surely, 2^66124440010 is an apocalyptic number.

66124440010 is a deficient number, since it is larger than the sum of its proper divisors (52969228190).

66124440010 is a wasteful number, since it uses less digits than its factorization.

66124440010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3870905.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 66124440010 its reverse (1004442166), we get a palindrome (67128882176).

The spelling of 66124440010 in words is "sixty-six billion, one hundred twenty-four million, four hundred forty thousand, ten".