68837681 has 8 divisors (see below), whose sum is σ = 75825984. Its totient is φ = 61971120.

The previous prime is 68837663. The next prime is 68837761. The reversal of 68837681 is 18673886.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68837681 is a prime.

It is a super-2 number, since 2×68837681² = 9477252650915522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68837611) 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, 29246 + ... + 31511.

It is an arithmetic number, because the mean of its divisors is an integer number (9478248).

Almost surely, 2^68837681 is an apocalyptic number.

It is an amenable number.

68837681 is a deficient number, since it is larger than the sum of its proper divisors (6988303).

68837681 is a wasteful number, since it uses less digits than its factorization.

68837681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60871.

The product of its digits is 387072, while the sum is 47.

The square root of 68837681 is about 8296.8476543805. The cubic root of 68837681 is about 409.8347162453.

The spelling of 68837681 in words is "sixty-eight million, eight hundred thirty-seven thousand, six hundred eighty-one".