68066840 has 64 divisors (see below), whose sum is σ = 158124960. Its totient is φ = 26357760.

The previous prime is 68066837. The next prime is 68066851. The reversal of 68066840 is 4866086.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 68066794 and 68066803.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 205475 + ... + 205805.

Almost surely, 2^68066840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68066840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79062480).

68066840 is an abundant number, since it is smaller than the sum of its proper divisors (90058120).

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

68066840 is a wasteful number, since it uses less digits than its factorization.

68066840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492 (or 488 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 68066840 is about 8250.2630261101. The cubic root of 68066840 is about 408.2992006269.

The spelling of 68066840 in words is "sixty-eight million, sixty-six thousand, eight hundred forty".