66446410034521 has 16 divisors (see below), whose sum is σ = 75838175400960. Its totient is φ = 57627034431120.

The previous prime is 66446410034449. The next prime is 66446410034527. The reversal of 66446410034521 is 12543001464466.

It is not a de Polignac number, because 66446410034521 - 2⁷ = 66446410034393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66446410034527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 346387005 + ... + 346578778.

It is an arithmetic number, because the mean of its divisors is an integer number (4739885962560).

Almost surely, 2^{66446410034521} is an apocalyptic number.

It is an amenable number.

66446410034521 is a deficient number, since it is larger than the sum of its proper divisors (9391765366439).

66446410034521 is a wasteful number, since it uses less digits than its factorization.

66446410034521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692966196.

The product of its (nonzero) digits is 1658880, while the sum is 46.

Adding to 66446410034521 its reverse (12543001464466), we get a palindrome (78989411498987).

The spelling of 66446410034521 in words is "sixty-six trillion, four hundred forty-six billion, four hundred ten million, thirty-four thousand, five hundred twenty-one".