68866944 has 64 divisors (see below), whose sum is σ = 192576000. Its totient is φ = 21745152.

The previous prime is 68866943. The next prime is 68866969. The reversal of 68866944 is 44966886.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68866943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2577 + ... + 12015.

It is an arithmetic number, because the mean of its divisors is an integer number (3009000).

Almost surely, 2^68866944 is an apocalyptic number.

68866944 is a gapful number since it is divisible by the number (64) 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 68866944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96288000).

68866944 is an abundant number, since it is smaller than the sum of its proper divisors (123709056).

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

68866944 is a wasteful number, since it uses less digits than its factorization.

68866944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9475 (or 9463 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 51.

The square root of 68866944 is about 8298.6109681079. The cubic root of 68866944 is about 409.8927817995.

The spelling of 68866944 in words is "sixty-eight million, eight hundred sixty-six thousand, nine hundred forty-four".