66878306 has 16 divisors (see below), whose sum is σ = 115875360. Its totient is φ = 28610880.

The previous prime is 66878303. The next prime is 66878333. The reversal of 66878306 is 60387866.

It is not an unprimeable number, because it can be changed into a prime (66878303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89036 + ... + 89783.

It is an arithmetic number, because the mean of its divisors is an integer number (7242210).

Almost surely, 2^66878306 is an apocalyptic number.

66878306 is a deficient number, since it is larger than the sum of its proper divisors (48997054).

66878306 is a wasteful number, since it uses less digits than its factorization.

66878306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178849.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 66878306 is about 8177.9157491380. The cubic root of 66878306 is about 405.9087575139.

The spelling of 66878306 in words is "sixty-six million, eight hundred seventy-eight thousand, three hundred six".