67014669665 has 4 divisors (see below), whose sum is σ = 80417603604. Its totient is φ = 53611735728.

The previous prime is 67014669661. The next prime is 67014669679. The reversal of 67014669665 is 56696641076.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36513095056 + 30501574609 = 191084^2 + 174647^2 .

It is a cyclic number.

It is not a de Polignac number, because 67014669665 - 2² = 67014669661 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 67014669665.

It is not an unprimeable number, because it can be changed into a prime (67014669661) 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 3 ways as a sum of consecutive naturals, for example, 6701466962 + ... + 6701466971.

It is an arithmetic number, because the mean of its divisors is an integer number (20104400901).

Almost surely, 2^67014669665 is an apocalyptic number.

It is an amenable number.

67014669665 is a deficient number, since it is larger than the sum of its proper divisors (13402933939).

67014669665 is a wasteful number, since it uses less digits than its factorization.

67014669665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13402933938.

The product of its (nonzero) digits is 9797760, while the sum is 56.

The spelling of 67014669665 in words is "sixty-seven billion, fourteen million, six hundred sixty-nine thousand, six hundred sixty-five".