68636885 has 8 divisors (see below), whose sum is σ = 82841400. Its totient is φ = 54591424.

The previous prime is 68636879. The next prime is 68636917. The reversal of 68636885 is 58863686.

It can be written as a sum of positive squares in 4 ways, for example, as 4268356 + 64368529 = 2066^2 + 8023^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68636885 - 2⁸ = 68636629 is a prime.

It is a super-2 number, since 2×68636885² = 9422043965006450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38810 + ... + 40539.

It is an arithmetic number, because the mean of its divisors is an integer number (10355175).

Almost surely, 2^68636885 is an apocalyptic number.

It is an amenable number.

68636885 is a deficient number, since it is larger than the sum of its proper divisors (14204515).

68636885 is a wasteful number, since it uses less digits than its factorization.

68636885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79527.

The product of its digits is 1658880, while the sum is 50.

The square root of 68636885 is about 8284.7380767288. The cubic root of 68636885 is about 409.4358391797.

The spelling of 68636885 in words is "sixty-eight million, six hundred thirty-six thousand, eight hundred eighty-five".