667634423723546 has 8 divisors (see below), whose sum is σ = 1001457702432864. Its totient is φ = 333815189579260.

The previous prime is 667634423723503. The next prime is 667634423723563. The reversal of 667634423723546 is 645327324436766.

667634423723546 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1010728550 + ... + 1011388881.

It is an arithmetic number, because the mean of its divisors is an integer number (125182212804108).

Almost surely, 2^{667634423723546} is an apocalyptic number.

667634423723546 is a deficient number, since it is larger than the sum of its proper divisors (333823278709318).

667634423723546 is a wasteful number, since it uses less digits than its factorization.

667634423723546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2022282516.

The product of its digits is 2194698240, while the sum is 68.

The spelling of 667634423723546 in words is "six hundred sixty-seven trillion, six hundred thirty-four billion, four hundred twenty-three million, seven hundred twenty-three thousand, five hundred forty-six".