67242664661 has 4 divisors (see below), whose sum is σ = 67377420000. Its totient is φ = 67107909324.

The previous prime is 67242664651. The next prime is 67242664663. The reversal of 67242664661 is 16646624276.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 67242664661 - 2⁶ = 67242664597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67242664663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67376921 + ... + 67377918.

It is an arithmetic number, because the mean of its divisors is an integer number (16844355000).

Almost surely, 2^67242664661 is an apocalyptic number.

It is an amenable number.

67242664661 is a deficient number, since it is larger than the sum of its proper divisors (134755339).

67242664661 is a wasteful number, since it uses less digits than its factorization.

67242664661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134755338.

The product of its digits is 3483648, while the sum is 50.

The spelling of 67242664661 in words is "sixty-seven billion, two hundred forty-two million, six hundred sixty-four thousand, six hundred sixty-one".