66475277584 has 45 divisors (see below), whose sum is σ = 131948784183. Its totient is φ = 32443012896.

The previous prime is 66475277581. The next prime is 66475277629. The reversal of 66475277584 is 48577257466.

The square root of 66475277584 is 257828.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66475277581) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 44345667 + ... + 44347165.

Almost surely, 2^66475277584 is an apocalyptic number.

66475277584 is the 257828-th square number.

It is an amenable number.

66475277584 is a deficient number, since it is larger than the sum of its proper divisors (65473506599).

66475277584 is an frugal number, since it uses more digits than its factorization.

66475277584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3092 (or 1544 counting only the distinct ones).

The product of its digits is 79027200, while the sum is 61.

The spelling of 66475277584 in words is "sixty-six billion, four hundred seventy-five million, two hundred seventy-seven thousand, five hundred eighty-four".