67244452906 has 4 divisors (see below), whose sum is σ = 100866679362. Its totient is φ = 33622226452.

The previous prime is 67244452861. The next prime is 67244452909. The reversal of 67244452906 is 60925444276.

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

It can be written as a sum of positive squares in only one way, i.e., 56354486881 + 10889966025 = 237391^2 + 104355^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 67244452906.

It is not an unprimeable number, because it can be changed into a prime (67244452909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16811113225 + ... + 16811113228.

Almost surely, 2^67244452906 is an apocalyptic number.

67244452906 is a deficient number, since it is larger than the sum of its proper divisors (33622226456).

67244452906 is a wasteful number, since it uses less digits than its factorization.

67244452906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33622226455.

The product of its (nonzero) digits is 2903040, while the sum is 49.

The spelling of 67244452906 in words is "sixty-seven billion, two hundred forty-four million, four hundred fifty-two thousand, nine hundred six".