66668474 has 8 divisors (see below), whose sum is σ = 100102080. Its totient is φ = 33301116.

The previous prime is 66668449. The next prime is 66668479. The reversal of 66668474 is 47486666.

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 (66668479) 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, 13964 + ... + 18119.

It is an arithmetic number, because the mean of its divisors is an integer number (12512760).

Almost surely, 2^66668474 is an apocalyptic number.

66668474 is a deficient number, since it is larger than the sum of its proper divisors (33433606).

66668474 is a wasteful number, since it uses less digits than its factorization.

66668474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33124.

The product of its digits is 1161216, while the sum is 47.

The square root of 66668474 is about 8165.0764846387. The cubic root of 66668474 is about 405.4837971939.

The spelling of 66668474 in words is "sixty-six million, six hundred sixty-eight thousand, four hundred seventy-four".