66441276928 has 80 divisors (see below), whose sum is σ = 150489274320. Its totient is φ = 29051191296.

The previous prime is 66441276917. The next prime is 66441276949. The reversal of 66441276928 is 82967214466.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136225 + ... + 389152.

It is an arithmetic number, because the mean of its divisors is an integer number (1881115929).

Almost surely, 2^66441276928 is an apocalyptic number.

It is an amenable number.

66441276928 is an abundant number, since it is smaller than the sum of its proper divisors (84047997392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66441276928 is a wasteful number, since it uses less digits than its factorization.

66441276928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525427 (or 525411 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 55.

The spelling of 66441276928 in words is "sixty-six billion, four hundred forty-one million, two hundred seventy-six thousand, nine hundred twenty-eight".