68806516 has 6 divisors (see below), whose sum is σ = 120411410. Its totient is φ = 34403256.

The previous prime is 68806513. The next prime is 68806519. The reversal of 68806516 is 61560886.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (68806513) and next prime (68806519).

It can be written as a sum of positive squares in only one way, i.e., 67996516 + 810000 = 8246^2 + 900^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68806511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8600811 + ... + 8600818.

Almost surely, 2^68806516 is an apocalyptic number.

It is an amenable number.

68806516 is a deficient number, since it is larger than the sum of its proper divisors (51604894).

68806516 is a wasteful number, since it uses less digits than its factorization.

68806516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17201633 (or 17201631 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 68806516 is about 8294.9693188100. The cubic root of 68806516 is about 409.7728585208.

The spelling of 68806516 in words is "sixty-eight million, eight hundred six thousand, five hundred sixteen".