66908798 has 8 divisors (see below), whose sum is σ = 109487160. Its totient is φ = 30413080.

The previous prime is 66908797. The next prime is 66908801. The reversal of 66908798 is 89780966.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66908791) 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 3 ways as a sum of consecutive naturals, for example, 1520633 + ... + 1520676.

It is an arithmetic number, because the mean of its divisors is an integer number (13685895).

Almost surely, 2^66908798 is an apocalyptic number.

66908798 is a deficient number, since it is larger than the sum of its proper divisors (42578362).

66908798 is a wasteful number, since it uses less digits than its factorization.

66908798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3041322.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The square root of 66908798 is about 8179.7798258877. The cubic root of 66908798 is about 405.9704371528.

The spelling of 66908798 in words is "sixty-six million, nine hundred eight thousand, seven hundred ninety-eight".