68616424 has 8 divisors (see below), whose sum is σ = 128655810. Its totient is φ = 34308208.

The previous prime is 68616421. The next prime is 68616439. The reversal of 68616424 is 42461686.

It can be written as a sum of positive squares in only one way, i.e., 38564100 + 30052324 = 6210^2 + 5482^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (68616421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4288519 + ... + 4288534.

Almost surely, 2^68616424 is an apocalyptic number.

It is an amenable number.

68616424 is a deficient number, since it is larger than the sum of its proper divisors (60039386).

68616424 is a wasteful number, since it uses less digits than its factorization.

68616424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8577059 (or 8577055 counting only the distinct ones).

The product of its digits is 55296, while the sum is 37.

The square root of 68616424 is about 8283.5031236790. The cubic root of 68616424 is about 409.3951501765.

The spelling of 68616424 in words is "sixty-eight million, six hundred sixteen thousand, four hundred twenty-four".