66067443772 has 72 divisors (see below), whose sum is σ = 128807618688. Its totient is φ = 29625953280.

The previous prime is 66067443763. The next prime is 66067443809. The reversal of 66067443772 is 27734476066.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 12193608 + ... + 12199024.

It is an arithmetic number, because the mean of its divisors is an integer number (1788994704).

Almost surely, 2^66067443772 is an apocalyptic number.

It is an amenable number.

66067443772 is a deficient number, since it is larger than the sum of its proper divisors (62740174916).

66067443772 is a wasteful number, since it uses less digits than its factorization.

66067443772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5779 (or 5766 counting only the distinct ones).

The product of its (nonzero) digits is 7112448, while the sum is 52.

The spelling of 66067443772 in words is "sixty-six billion, sixty-seven million, four hundred forty-three thousand, seven hundred seventy-two".