It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-66678899 is a prime.
It is a Duffinian number.
It is a plaindrome in base 10.
Almost surely, 266678899 is an apocalyptic number.
66678899 is a wasteful number, since it uses less digits than its factorization.
66678899 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 58609.
The square root of 66678899 is about 8165.7148492952. The cubic root of 66678899 is about 405.5049313623.
The spelling of 66678899 in words is "sixty-six million, six hundred seventy-eight thousand, eight hundred ninety-nine".