67679470949 has 4 divisors (see below), whose sum is σ = 68053390860. Its totient is φ = 67305551040.

The previous prime is 67679470927. The next prime is 67679470951. The reversal of 67679470949 is 94907497676.

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 321054724 + 67358416225 = 17918^2 + 259535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67679470949 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 (67679470849) 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, 186959684 + ... + 186960045.

It is an arithmetic number, because the mean of its divisors is an integer number (17013347715).

Almost surely, 2^67679470949 is an apocalyptic number.

It is an amenable number.

67679470949 is a deficient number, since it is larger than the sum of its proper divisors (373919911).

67679470949 is a wasteful number, since it uses less digits than its factorization.

67679470949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373919910.

The product of its (nonzero) digits is 144027072, while the sum is 68.

The spelling of 67679470949 in words is "sixty-seven billion, six hundred seventy-nine million, four hundred seventy thousand, nine hundred forty-nine".