66678610 has 32 divisors (see below), whose sum is σ = 125867520. Its totient is φ = 25384128.

The previous prime is 66678583. The next prime is 66678629. The reversal of 66678610 is 1687666.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 54364 + ... + 55576.

It is an arithmetic number, because the mean of its divisors is an integer number (3933360).

Almost surely, 2^66678610 is an apocalyptic number.

66678610 is a deficient number, since it is larger than the sum of its proper divisors (59188910).

66678610 is a wasteful number, since it uses less digits than its factorization.

66678610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1482.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 66678610 is about 8165.6971533360. The cubic root of 66678610 is about 405.5043455143.

The spelling of 66678610 in words is "sixty-six million, six hundred seventy-eight thousand, six hundred ten".