68677657 has 4 divisors (see below), whose sum is σ = 68698420. Its totient is φ = 68656896.

The previous prime is 68677639. The next prime is 68677673. The reversal of 68677657 is 75677686.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22695696 + 45981961 = 4764^2 + 6781^2 .

It is a cyclic number.

It is not a de Polignac number, because 68677657 - 2¹⁹ = 68153369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68677607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4188 + ... + 12445.

It is an arithmetic number, because the mean of its divisors is an integer number (17174605).

Almost surely, 2^68677657 is an apocalyptic number.

It is an amenable number.

68677657 is a deficient number, since it is larger than the sum of its proper divisors (20763).

68677657 is a wasteful number, since it uses less digits than its factorization.

68677657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20762.

The product of its digits is 2963520, while the sum is 52.

The square root of 68677657 is about 8287.1983806350. The cubic root of 68677657 is about 409.5168947893.

The spelling of 68677657 in words is "sixty-eight million, six hundred seventy-seven thousand, six hundred fifty-seven".