66967855 has 8 divisors (see below), whose sum is σ = 80975664. Its totient is φ = 53164800.

The previous prime is 66967829. The next prime is 66967871. The reversal of 66967855 is 55876966.

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

It is not a de Polignac number, because 66967855 - 2¹¹ = 66965807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 50466 + ... + 51775.

It is an arithmetic number, because the mean of its divisors is an integer number (10121958).

Almost surely, 2^66967855 is an apocalyptic number.

66967855 is a deficient number, since it is larger than the sum of its proper divisors (14007809).

66967855 is a wasteful number, since it uses less digits than its factorization.

66967855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102377.

The product of its digits is 2721600, while the sum is 52.

The square root of 66967855 is about 8183.3889679032. The cubic root of 66967855 is about 406.0898451944.

The spelling of 66967855 in words is "sixty-six million, nine hundred sixty-seven thousand, eight hundred fifty-five".