68740682 has 16 divisors (see below), whose sum is σ = 107625672. Its totient is φ = 32897280.

The previous prime is 68740627. The next prime is 68740687. The reversal of 68740682 is 28604786.

It is a Cunningham number, because it is equal to 8291²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 61293241 + 7447441 = 7829^2 + 2729^2 .

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (68740687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3563 + ... + 12254.

Almost surely, 2^68740682 is an apocalyptic number.

68740682 is a deficient number, since it is larger than the sum of its proper divisors (38884990).

68740682 is a wasteful number, since it uses less digits than its factorization.

68740682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15913.

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 68740682 is about 8291.0000603064. Note that the first 4 decimals coincide. The cubic root of 68740682 is about 409.6421267414.

The spelling of 68740682 in words is "sixty-eight million, seven hundred forty thousand, six hundred eighty-two".