68669536 has 48 divisors (see below), whose sum is σ = 151943904. Its totient is φ = 30311424.

The previous prime is 68669509. The next prime is 68669537. The reversal of 68669536 is 63596686.

It is a self number, because there is not a number n which added to its sum of digits gives 68669536.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68669537) 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, 5980 + ... + 13156.

It is an arithmetic number, because the mean of its divisors is an integer number (3165498).

Almost surely, 2^68669536 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 68669536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75971952).

68669536 is an abundant number, since it is smaller than the sum of its proper divisors (83274368).

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

68669536 is a wasteful number, since it uses less digits than its factorization.

68669536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7223 (or 7215 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 49.

The square root of 68669536 is about 8286.7083935662. The cubic root of 68669536 is about 409.5007526264.

The spelling of 68669536 in words is "sixty-eight million, six hundred sixty-nine thousand, five hundred thirty-six".