67820545 has 24 divisors (see below), whose sum is σ = 89280576. Its totient is φ = 49428288.

The previous prime is 67820539. The next prime is 67820561. The reversal of 67820545 is 54502876.

It is a happy number.

It is not a de Polignac number, because 67820545 - 2⁵ = 67820513 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69652 + ... + 70618.

It is an arithmetic number, because the mean of its divisors is an integer number (3720024).

Almost surely, 2^67820545 is an apocalyptic number.

67820545 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

67820545 is a deficient number, since it is larger than the sum of its proper divisors (21460031).

67820545 is a wasteful number, since it uses less digits than its factorization.

67820545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081 (or 1068 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 67820545 is about 8235.3230052014. The cubic root of 67820545 is about 407.8061382771.

The spelling of 67820545 in words is "sixty-seven million, eight hundred twenty thousand, five hundred forty-five".