67117427520 has 224 divisors, whose sum is σ = 250353210240. Its totient is φ = 15019253760.

The previous prime is 67117427497. The next prime is 67117427539. The reversal of 67117427520 is 2572471176.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 107175 + ... + 381734.

It is an arithmetic number, because the mean of its divisors is an integer number (1117648260).

Almost surely, 2^67117427520 is an apocalyptic number.

67117427520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67117427520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125176605120).

67117427520 is an abundant number, since it is smaller than the sum of its proper divisors (183235782720).

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

67117427520 is a wasteful number, since it uses less digits than its factorization.

67117427520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488953 (or 488943 counting only the distinct ones).

The product of its (nonzero) digits is 164640, while the sum is 42.

Adding to 67117427520 its reverse (2572471176), we get a palindrome (69689898696).

The spelling of 67117427520 in words is "sixty-seven billion, one hundred seventeen million, four hundred twenty-seven thousand, five hundred twenty".