68677821 has 8 divisors (see below), whose sum is σ = 101744960. Its totient is φ = 45785196.

The previous prime is 68677813. The next prime is 68677823. The reversal of 68677821 is 12877686.

It is not a de Polignac number, because 68677821 - 2³ = 68677813 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 (68677823) 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, 1271785 + ... + 1271838.

It is an arithmetic number, because the mean of its divisors is an integer number (12718120).

Almost surely, 2^68677821 is an apocalyptic number.

It is an amenable number.

68677821 is a deficient number, since it is larger than the sum of its proper divisors (33067139).

68677821 is a wasteful number, since it uses less digits than its factorization.

68677821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2543632 (or 2543626 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 68677821 is about 8287.2082754086. The cubic root of 68677821 is about 409.5172207601.

The spelling of 68677821 in words is "sixty-eight million, six hundred seventy-seven thousand, eight hundred twenty-one".