68479668 has 60 divisors (see below), whose sum is σ = 179967172. Its totient is φ = 22705920.

The previous prime is 68479613. The next prime is 68479669. The reversal of 68479668 is 86697486.

It can be written as a sum of positive squares in 2 ways, for example, as 54730404 + 13749264 = 7398^2 + 3708^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

Its product of digits (3483648) is a multiple of the sum of its prime factors (1134).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68479669) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 77646 + ... + 78522.

Almost surely, 2^68479668 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 68479668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89983586).

68479668 is an abundant number, since it is smaller than the sum of its proper divisors (111487504).

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

68479668 is a wasteful number, since it uses less digits than its factorization.

68479668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134 (or 1123 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 68479668 is about 8275.2442864244. The cubic root of 68479668 is about 409.1229875451.

The spelling of 68479668 in words is "sixty-eight million, four hundred seventy-nine thousand, six hundred sixty-eight".