67540820 has 24 divisors (see below), whose sum is σ = 149301600. Its totient is φ = 25594272.

The previous prime is 67540793. The next prime is 67540867. The reversal of 67540820 is 2804576.

It is a congruent number.

It is an unprimeable number.

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, 88490 + ... + 89249.

It is an arithmetic number, because the mean of its divisors is an integer number (6220900).

Almost surely, 2^67540820 is an apocalyptic number.

It is an amenable number.

67540820 is an abundant number, since it is smaller than the sum of its proper divisors (81760780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67540820 is a wasteful number, since it uses less digits than its factorization.

67540820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177767 (or 177765 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 67540820 is about 8218.3222132014. The cubic root of 67540820 is about 407.2447018959.

The spelling of 67540820 in words is "sixty-seven million, five hundred forty thousand, eight hundred twenty".