68656216 has 8 divisors (see below), whose sum is σ = 128730420. Its totient is φ = 34328104.

The previous prime is 68656213. The next prime is 68656223. The reversal of 68656216 is 61265686.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68656213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4291006 + ... + 4291021.

Almost surely, 2^68656216 is an apocalyptic number.

It is an amenable number.

68656216 is a deficient number, since it is larger than the sum of its proper divisors (60074204).

68656216 is a wasteful number, since it uses less digits than its factorization.

68656216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8582033 (or 8582029 counting only the distinct ones).

The product of its digits is 103680, while the sum is 40.

The square root of 68656216 is about 8285.9046579115. The cubic root of 68656216 is about 409.4742736224.

The spelling of 68656216 in words is "sixty-eight million, six hundred fifty-six thousand, two hundred sixteen".