67140871 has 16 divisors (see below), whose sum is σ = 81981504. Its totient is φ = 53673984.

The previous prime is 67140869. The next prime is 67140883. The reversal of 67140871 is 17804176.

It is not a de Polignac number, because 67140871 - 2¹ = 67140869 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 (67140811) 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, 10951 + ... + 15943.

It is an arithmetic number, because the mean of its divisors is an integer number (5123844).

Almost surely, 2^67140871 is an apocalyptic number.

67140871 is a deficient number, since it is larger than the sum of its proper divisors (14840633).

67140871 is a wasteful number, since it uses less digits than its factorization.

67140871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5130.

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 67140871 is about 8193.9533193691. The cubic root of 67140871 is about 406.4392646791.

The spelling of 67140871 in words is "sixty-seven million, one hundred forty thousand, eight hundred seventy-one".