67064243408 has 10 divisors (see below), whose sum is σ = 129936971634. Its totient is φ = 33532121696.

The previous prime is 67064243401. The next prime is 67064243413. The reversal of 67064243408 is 80434246076.

It can be written as a sum of positive squares in only one way, i.e., 64106188864 + 2958054544 = 253192^2 + 54388^2 .

It is a super-2 number, since 2×67064243408² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67064243401) 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 as a sum of consecutive naturals, namely, 2095757591 + ... + 2095757622.

Almost surely, 2^67064243408 is an apocalyptic number.

It is an amenable number.

67064243408 is a deficient number, since it is larger than the sum of its proper divisors (62872728226).

67064243408 is a wasteful number, since it uses less digits than its factorization.

67064243408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4191515221 (or 4191515215 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 44.

The spelling of 67064243408 in words is "sixty-seven billion, sixty-four million, two hundred forty-three thousand, four hundred eight".