67139568 has 30 divisors (see below), whose sum is σ = 187897944. Its totient is φ = 22379808.

The previous prime is 67139557. The next prime is 67139587. The reversal of 67139568 is 86593176.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 232980 + ... + 233267.

Almost surely, 2^67139568 is an apocalyptic number.

It is an amenable number.

67139568 is an abundant number, since it is smaller than the sum of its proper divisors (120758376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67139568 is a wasteful number, since it uses less digits than its factorization.

67139568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466261 (or 466252 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 67139568 is about 8193.8738091333. The cubic root of 67139568 is about 406.4366354123.

The spelling of 67139568 in words is "sixty-seven million, one hundred thirty-nine thousand, five hundred sixty-eight".