67866282561 has 64 divisors (see below), whose sum is σ = 116950210560. Its totient is φ = 33981327360.

The previous prime is 67866282559. The next prime is 67866282569. The reversal of 67866282561 is 16528266876.

It is not a de Polignac number, because 67866282561 - 2¹ = 67866282559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67866282569) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 877425 + ... + 951633.

It is an arithmetic number, because the mean of its divisors is an integer number (1827347040).

Almost surely, 2^67866282561 is an apocalyptic number.

It is an amenable number.

67866282561 is a deficient number, since it is larger than the sum of its proper divisors (49083927999).

67866282561 is a wasteful number, since it uses less digits than its factorization.

67866282561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74374.

The product of its digits is 11612160, while the sum is 57.

The spelling of 67866282561 in words is "sixty-seven billion, eight hundred sixty-six million, two hundred eighty-two thousand, five hundred sixty-one".