68661087 has 12 divisors (see below), whose sum is σ = 100627800. Its totient is φ = 41612560.

The previous prime is 68661077. The next prime is 68661091. The reversal of 68661087 is 78016686.

It is not a de Polignac number, because 68661087 - 2⁷ = 68660959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68661017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94212 + ... + 94937.

It is an arithmetic number, because the mean of its divisors is an integer number (8385650).

Almost surely, 2^68661087 is an apocalyptic number.

68661087 is a deficient number, since it is larger than the sum of its proper divisors (31966713).

68661087 is a wasteful number, since it uses less digits than its factorization.

68661087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189174 (or 189163 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 68661087 is about 8286.1985856000. The cubic root of 68661087 is about 409.4839571448.

The spelling of 68661087 in words is "sixty-eight million, six hundred sixty-one thousand, eighty-seven".