68779216 has 20 divisors (see below), whose sum is σ = 145374624. Its totient is φ = 31263200.

The previous prime is 68779187. The next prime is 68779219. The reversal of 68779216 is 61297786.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68779219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195220 + ... + 195571.

Almost surely, 2^68779216 is an apocalyptic number.

It is an amenable number.

68779216 is an abundant number, since it is smaller than the sum of its proper divisors (76595408).

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

68779216 is a wasteful number, since it uses less digits than its factorization.

68779216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390810 (or 390804 counting only the distinct ones).

The product of its digits is 254016, while the sum is 46.

The square root of 68779216 is about 8293.3235798442. The cubic root of 68779216 is about 409.7186568767.

The spelling of 68779216 in words is "sixty-eight million, seven hundred seventy-nine thousand, two hundred sixteen".