68661693 has 24 divisors (see below), whose sum is σ = 103871040. Its totient is φ = 43623360.

The previous prime is 68661679. The next prime is 68661701. The reversal of 68661693 is 39616686.

It is not a de Polignac number, because 68661693 - 2⁶ = 68661629 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68661613) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 84258 + ... + 85068.

It is an arithmetic number, because the mean of its divisors is an integer number (4327960).

Almost surely, 2^68661693 is an apocalyptic number.

It is an amenable number.

68661693 is a deficient number, since it is larger than the sum of its proper divisors (35209347).

68661693 is a wasteful number, since it uses less digits than its factorization.

68661693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249 (or 1246 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 68661693 is about 8286.2351523475. The cubic root of 68661693 is about 409.4851618376.

The spelling of 68661693 in words is "sixty-eight million, six hundred sixty-one thousand, six hundred ninety-three".