66034204521 has 8 divisors (see below), whose sum is σ = 88111960704. Its totient is φ = 43989625680.

The previous prime is 66034204477. The next prime is 66034204529. The reversal of 66034204521 is 12540243066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66034204521 - 2⁷ = 66034204393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66034204529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8289690 + ... + 8297651.

It is an arithmetic number, because the mean of its divisors is an integer number (11013995088).

Almost surely, 2^66034204521 is an apocalyptic number.

It is an amenable number.

66034204521 is a deficient number, since it is larger than the sum of its proper divisors (22077756183).

66034204521 is a wasteful number, since it uses less digits than its factorization.

66034204521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16588671.

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 66034204521 its reverse (12540243066), we get a palindrome (78574447587).

It can be divided in two parts, 6603 and 4204521, that added together give a palindrome (4211124).

The spelling of 66034204521 in words is "sixty-six billion, thirty-four million, two hundred four thousand, five hundred twenty-one".