67681359 has 8 divisors (see below), whose sum is σ = 100268720. Its totient is φ = 45120888.

The previous prime is 67681357. The next prime is 67681381. The reversal of 67681359 is 95318676.

It is a happy number.

It is not a de Polignac number, because 67681359 - 2¹ = 67681357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67681357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1253332 + ... + 1253385.

It is an arithmetic number, because the mean of its divisors is an integer number (12533590).

Almost surely, 2^67681359 is an apocalyptic number.

67681359 is a deficient number, since it is larger than the sum of its proper divisors (32587361).

67681359 is a wasteful number, since it uses less digits than its factorization.

67681359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2506726 (or 2506720 counting only the distinct ones).

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

The square root of 67681359 is about 8226.8681161181. The cubic root of 67681359 is about 407.5269712536.

The spelling of 67681359 in words is "sixty-seven million, six hundred eighty-one thousand, three hundred fifty-nine".