67241567021 has 4 divisors (see below), whose sum is σ = 67244257500. Its totient is φ = 67238876544.

The previous prime is 67241567009. The next prime is 67241567023. The reversal of 67241567021 is 12076514276.

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 3247746121 + 63993820900 = 56989^2 + 252970^2 .

It is a cyclic number.

It is not a de Polignac number, because 67241567021 - 2¹⁰ = 67241565997 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 67241567021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67241567023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1307396 + ... + 1357853.

It is an arithmetic number, because the mean of its divisors is an integer number (16811064375).

Almost surely, 2^67241567021 is an apocalyptic number.

It is an amenable number.

67241567021 is a deficient number, since it is larger than the sum of its proper divisors (2690479).

67241567021 is a wasteful number, since it uses less digits than its factorization.

67241567021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2690478.

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 67241567021 in words is "sixty-seven billion, two hundred forty-one million, five hundred sixty-seven thousand, twenty-one".