68660647 has 8 divisors (see below), whose sum is σ = 74983680. Its totient is φ = 62351160.

The previous prime is 68660617. The next prime is 68660677. The reversal of 68660647 is 74606686.

It is an interprime number because it is at equal distance from previous prime (68660617) and next prime (68660677).

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 68660647 - 2⁷ = 68660519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68660617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9304 + ... + 14962.

It is an arithmetic number, because the mean of its divisors is an integer number (9372960).

Almost surely, 2^68660647 is an apocalyptic number.

68660647 is a deficient number, since it is larger than the sum of its proper divisors (6323033).

68660647 is a wasteful number, since it uses less digits than its factorization.

68660647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6773.

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 68660647 is about 8286.1720353852. The cubic root of 68660647 is about 409.4830824460.

The spelling of 68660647 in words is "sixty-eight million, six hundred sixty thousand, six hundred forty-seven".