67521872 has 30 divisors (see below), whose sum is σ = 143801994. Its totient is φ = 30690880.

The previous prime is 67521871. The next prime is 67521893. The reversal of 67521872 is 27812576.

It can be written as a sum of positive squares in only one way, i.e., 63425296 + 4096576 = 7964^2 + 2024^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67521871) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15503 + ... + 19374.

Almost surely, 2^67521872 is an apocalyptic number.

It is an amenable number.

67521872 is an abundant number, since it is smaller than the sum of its proper divisors (76280122).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67521872 is a wasteful number, since it uses less digits than its factorization.

67521872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34907 (or 34890 counting only the distinct ones).

The product of its digits is 47040, while the sum is 38.

The square root of 67521872 is about 8217.1693422979. The cubic root of 67521872 is about 407.2066153268.

The spelling of 67521872 in words is "sixty-seven million, five hundred twenty-one thousand, eight hundred seventy-two".