68607681 has 8 divisors (see below), whose sum is σ = 94427904. Its totient is φ = 44262960.

The previous prime is 68607673. The next prime is 68607701. The reversal of 68607681 is 18670686.

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

It is not a de Polignac number, because 68607681 - 2³ = 68607673 is a prime.

It is a super-2 number, since 2×68607681² = 9414027784395522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68607641) 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 7 ways as a sum of consecutive naturals, for example, 368766 + ... + 368951.

It is an arithmetic number, because the mean of its divisors is an integer number (11803488).

Almost surely, 2^68607681 is an apocalyptic number.

It is an amenable number.

68607681 is a deficient number, since it is larger than the sum of its proper divisors (25820223).

68607681 is a wasteful number, since it uses less digits than its factorization.

68607681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737751.

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

The square root of 68607681 is about 8282.9753712057. The cubic root of 68607681 is about 409.3777612696.

It can be divided in two parts, 6860 and 7681, that added together give a palindrome (14541).

The spelling of 68607681 in words is "sixty-eight million, six hundred seven thousand, six hundred eighty-one".