66667089437 has 16 divisors (see below), whose sum is σ = 74299680000. Its totient is φ = 59393901504.

The previous prime is 66667089431. The next prime is 66667089457. The reversal of 66667089437 is 73498076666.

It is a cyclic number.

It is not a de Polignac number, because 66667089437 - 2⁶ = 66667089373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66667089437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66667089431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 984764 + ... + 1050282.

It is an arithmetic number, because the mean of its divisors is an integer number (4643730000).

Almost surely, 2^66667089437 is an apocalyptic number.

It is an amenable number.

66667089437 is a deficient number, since it is larger than the sum of its proper divisors (7632590563).

66667089437 is a wasteful number, since it uses less digits than its factorization.

66667089437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68260.

The product of its (nonzero) digits is 54867456, while the sum is 62.

The spelling of 66667089437 in words is "sixty-six billion, six hundred sixty-seven million, eighty-nine thousand, four hundred thirty-seven".