66562666 has 8 divisors (see below), whose sum is σ = 99983520. Its totient is φ = 33234828.

The previous prime is 66562649. The next prime is 66562697. The reversal of 66562666 is 66626566.

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

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 3 ways as a sum of consecutive naturals, for example, 21436 + ... + 24343.

It is an arithmetic number, because the mean of its divisors is an integer number (12497940).

Almost surely, 2^66562666 is an apocalyptic number.

66562666 is a deficient number, since it is larger than the sum of its proper divisors (33420854).

66562666 is a wasteful number, since it uses less digits than its factorization.

66562666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46508.

The product of its digits is 466560, while the sum is 43.

The square root of 66562666 is about 8158.5946093675. The cubic root of 66562666 is about 405.2691722791.

The spelling of 66562666 in words is "sixty-six million, five hundred sixty-two thousand, six hundred sixty-six".