67006906765 has 4 divisors (see below), whose sum is σ = 80408288124. Its totient is φ = 53605525408.

The previous prime is 67006906763. The next prime is 67006906789. The reversal of 67006906765 is 56760960076.

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 46103819524 + 20903087241 = 214718^2 + 144579^2 .

It is a cyclic number.

It is not a de Polignac number, because 67006906765 - 2¹ = 67006906763 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67006906763) 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, 6700690672 + ... + 6700690681.

It is an arithmetic number, because the mean of its divisors is an integer number (20102072031).

Almost surely, 2^67006906765 is an apocalyptic number.

It is an amenable number.

67006906765 is a deficient number, since it is larger than the sum of its proper divisors (13401381359).

67006906765 is a wasteful number, since it uses less digits than its factorization.

67006906765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13401381358.

The product of its (nonzero) digits is 2857680, while the sum is 52.

The spelling of 67006906765 in words is "sixty-seven billion, six million, nine hundred six thousand, seven hundred sixty-five".