67981006 has 4 divisors (see below), whose sum is σ = 101971512. Its totient is φ = 33990502.

The previous prime is 67980973. The next prime is 67981007. The reversal of 67981006 is 60018976.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67981007) 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 as a sum of consecutive naturals, namely, 16995250 + ... + 16995253.

It is an arithmetic number, because the mean of its divisors is an integer number (25492878).

Almost surely, 2^67981006 is an apocalyptic number.

67981006 is a deficient number, since it is larger than the sum of its proper divisors (33990506).

67981006 is a wasteful number, since it uses less digits than its factorization.

67981006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33990505.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 67981006 is about 8245.0594903857. The cubic root of 67981006 is about 408.1275032425.

The spelling of 67981006 in words is "sixty-seven million, nine hundred eighty-one thousand, six".