66466460221 has 8 divisors (see below), whose sum is σ = 75976867904. Its totient is φ = 56959852320.

The previous prime is 66466460201. The next prime is 66466460227. The reversal of 66466460221 is 12206466466.

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

It is not a de Polignac number, because 66466460221 - 2⁵ = 66466460189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66466460227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 912360 + ... + 982513.

It is an arithmetic number, because the mean of its divisors is an integer number (9497108488).

Almost surely, 2^66466460221 is an apocalyptic number.

It is an amenable number.

66466460221 is a deficient number, since it is larger than the sum of its proper divisors (9510407683).

66466460221 is a wasteful number, since it uses less digits than its factorization.

66466460221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1899891.

The product of its (nonzero) digits is 497664, while the sum is 43.

The spelling of 66466460221 in words is "sixty-six billion, four hundred sixty-six million, four hundred sixty thousand, two hundred twenty-one".