67142681 has 8 divisors (see below), whose sum is σ = 70174080. Its totient is φ = 64120672.

The previous prime is 67142659. The next prime is 67142701. The reversal of 67142681 is 18624176.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 67142681 - 2²² = 62948377 is a prime.

It is a super-2 number, since 2×67142681² = 9016279223735522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67142081) 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, 15125 + ... + 19053.

It is an arithmetic number, because the mean of its divisors is an integer number (8771760).

Almost surely, 2^67142681 is an apocalyptic number.

It is an amenable number.

67142681 is a deficient number, since it is larger than the sum of its proper divisors (3031399).

67142681 is a wasteful number, since it uses less digits than its factorization.

67142681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4695.

The product of its digits is 16128, while the sum is 35.

The square root of 67142681 is about 8194.0637659223. The cubic root of 67142681 is about 406.4429169426.

The spelling of 67142681 in words is "sixty-seven million, one hundred forty-two thousand, six hundred eighty-one".