67820345 has 16 divisors (see below), whose sum is σ = 82969920. Its totient is φ = 53210304.

The previous prime is 67820341. The next prime is 67820351. The reversal of 67820345 is 54302876.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 67820345 - 2² = 67820341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67820341) 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 15 ways as a sum of consecutive naturals, for example, 57734 + ... + 58896.

It is an arithmetic number, because the mean of its divisors is an integer number (5185620).

Almost surely, 2^67820345 is an apocalyptic number.

It is an amenable number.

67820345 is a deficient number, since it is larger than the sum of its proper divisors (15149575).

67820345 is a wasteful number, since it uses less digits than its factorization.

67820345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1384.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 67820345 is about 8235.3108623779. The cubic root of 67820345 is about 407.8057374088.

The spelling of 67820345 in words is "sixty-seven million, eight hundred twenty thousand, three hundred forty-five".