68424664 has 64 divisors (see below), whose sum is σ = 161533440. Its totient is φ = 26396160.

The previous prime is 68424661. The next prime is 68424667. The reversal of 68424664 is 46642486.

It is an interprime number because it is at equal distance from previous prime (68424661) and next prime (68424667).

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68424661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69117 + ... + 70099.

It is an arithmetic number, because the mean of its divisors is an integer number (2523960).

Almost surely, 2^68424664 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 68424664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80766720).

68424664 is an abundant number, since it is smaller than the sum of its proper divisors (93108776).

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

68424664 is a wasteful number, since it uses less digits than its factorization.

68424664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120 (or 1116 counting only the distinct ones).

The product of its digits is 221184, while the sum is 40.

The square root of 68424664 is about 8271.9202123812. The cubic root of 68424664 is about 409.0134200916.

The spelling of 68424664 in words is "sixty-eight million, four hundred twenty-four thousand, six hundred sixty-four".