68221776 has 80 divisors (see below), whose sum is σ = 202419584. Its totient is φ = 19395072.

The previous prime is 68221771. The next prime is 68221801. The reversal of 68221776 is 67712286.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68221771) 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 15 ways as a sum of consecutive naturals, for example, 92706 + ... + 93438.

Almost surely, 2^68221776 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 68221776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101209792).

68221776 is an abundant number, since it is smaller than the sum of its proper divisors (134197808).

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

68221776 is a wasteful number, since it uses less digits than its factorization.

68221776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028 (or 1022 counting only the distinct ones).

The product of its digits is 56448, while the sum is 39.

The square root of 68221776 is about 8259.6474501034. The cubic root of 68221776 is about 408.6087605987.

The spelling of 68221776 in words is "sixty-eight million, two hundred twenty-one thousand, seven hundred seventy-six".