68075520 has 120 divisors (see below), whose sum is σ = 218621424. Its totient is φ = 18087936.

The previous prime is 68075507. The next prime is 68075533. The reversal of 68075520 is 2557086.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (68075507) and next prime (68075533).

It is a tau number, because it is divible by the number of its divisors (120).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245622 + ... + 245898.

Almost surely, 2^68075520 is an apocalyptic number.

68075520 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 68075520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109310712).

68075520 is an abundant number, since it is smaller than the sum of its proper divisors (150545904).

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

68075520 is an equidigital number, since it uses as much as digits as its factorization.

68075520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 68075520 is about 8250.7890531755. The cubic root of 68075520 is about 408.3165555603.

The spelling of 68075520 in words is "sixty-eight million, seventy-five thousand, five hundred twenty".