68616404 has 6 divisors (see below), whose sum is σ = 120078714. Its totient is φ = 34308200.

The previous prime is 68616371. The next prime is 68616409. The reversal of 68616404 is 40461686.

It can be written as a sum of positive squares in only one way, i.e., 60031504 + 8584900 = 7748^2 + 2930^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68616409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8577047 + ... + 8577054.

It is an arithmetic number, because the mean of its divisors is an integer number (20013119).

Almost surely, 2^68616404 is an apocalyptic number.

It is an amenable number.

68616404 is a deficient number, since it is larger than the sum of its proper divisors (51462310).

68616404 is a wasteful number, since it uses less digits than its factorization.

68616404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17154105 (or 17154103 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 68616404 is about 8283.5019164602. The cubic root of 68616404 is about 409.3951104003.

The spelling of 68616404 in words is "sixty-eight million, six hundred sixteen thousand, four hundred four".