67861871 has 16 divisors (see below), whose sum is σ = 85805568. Its totient is φ = 52130400.

The previous prime is 67861867. The next prime is 67861897. The reversal of 67861871 is 17816876.

It is not a de Polignac number, because 67861871 - 2² = 67861867 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 (67861271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 740 + ... + 11673.

It is an arithmetic number, because the mean of its divisors is an integer number (5362848).

Almost surely, 2^67861871 is an apocalyptic number.

67861871 is a deficient number, since it is larger than the sum of its proper divisors (17943697).

67861871 is a wasteful number, since it uses less digits than its factorization.

67861871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12502.

The product of its digits is 112896, while the sum is 44.

The square root of 67861871 is about 8237.8316928668. The cubic root of 67861871 is about 407.8889527818. Note that the first 3 decimals are identical.

The spelling of 67861871 in words is "sixty-seven million, eight hundred sixty-one thousand, eight hundred seventy-one".