67520871 has 20 divisors (see below), whose sum is σ = 110035464. Its totient is φ = 40921200.

The previous prime is 67520863. The next prime is 67520897. The reversal of 67520871 is 17802576.

67520871 is a `hidden beast` number, since 67 + 520 + 8 + 71 = 666.

It is not a de Polignac number, because 67520871 - 2³ = 67520863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67520771) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 37000 + ... + 38781.

Almost surely, 2^67520871 is an apocalyptic number.

67520871 is a deficient number, since it is larger than the sum of its proper divisors (42514593).

67520871 is a wasteful number, since it uses less digits than its factorization.

67520871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75804 (or 75795 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 67520871 is about 8217.1084330195. The cubic root of 67520871 is about 407.2046030611.

The spelling of 67520871 in words is "sixty-seven million, five hundred twenty thousand, eight hundred seventy-one".