66676658 has 8 divisors (see below), whose sum is σ = 101507952. Its totient is φ = 32840676.

The previous prime is 66676657. The next prime is 66676697. The reversal of 66676658 is 85667666.

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

It is not an unprimeable number, because it can be changed into a prime (66676657) 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 3 ways as a sum of consecutive naturals, for example, 248660 + ... + 248927.

It is an arithmetic number, because the mean of its divisors is an integer number (12688494).

Almost surely, 2^66676658 is an apocalyptic number.

66676658 is a deficient number, since it is larger than the sum of its proper divisors (34831294).

66676658 is a wasteful number, since it uses less digits than its factorization.

66676658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497656.

The product of its digits is 2177280, while the sum is 50.

The square root of 66676658 is about 8165.5776280677. The cubic root of 66676658 is about 405.5003884622.

The spelling of 66676658 in words is "sixty-six million, six hundred seventy-six thousand, six hundred fifty-eight".