68369664 has 72 divisors (see below), whose sum is σ = 198529632. Its totient is φ = 20715520.

The previous prime is 68369659. The next prime is 68369677. The reversal of 68369664 is 46696386.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4402 + ... + 12494.

It is an arithmetic number, because the mean of its divisors is an integer number (2757356).

Almost surely, 2^68369664 is an apocalyptic number.

68369664 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 68369664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99264816).

68369664 is an abundant number, since it is smaller than the sum of its proper divisors (130159968).

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

68369664 is a wasteful number, since it uses less digits than its factorization.

68369664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8123 (or 8109 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 48.

The square root of 68369664 is about 8268.5950438995. The cubic root of 68369664 is about 408.9038018785.

The spelling of 68369664 in words is "sixty-eight million, three hundred sixty-nine thousand, six hundred sixty-four".