68405607 has 16 divisors (see below), whose sum is σ = 102086880. Its totient is φ = 45268416.

The previous prime is 68405587. The next prime is 68405609. The reversal of 68405607 is 70650486.

It is a happy number.

68405607 is a `hidden beast` number, since 6 + 8 + 40 + 5 + 607 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-68405607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68405609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5548 + ... + 12945.

It is an arithmetic number, because the mean of its divisors is an integer number (6380430).

Almost surely, 2^68405607 is an apocalyptic number.

68405607 is a deficient number, since it is larger than the sum of its proper divisors (33681273).

68405607 is a wasteful number, since it uses less digits than its factorization.

68405607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18639 (or 18633 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 68405607 is about 8270.7682230854. The cubic root of 68405607 is about 408.9754450300.

The spelling of 68405607 in words is "sixty-eight million, four hundred five thousand, six hundred seven".