66000666 has 8 divisors (see below), whose sum is σ = 132001344. Its totient is φ = 22000220.

The previous prime is 66000659. The next prime is 66000673. The reversal of 66000666 is 66600066.

It is an interprime number because it is at equal distance from previous prime (66000659) and next prime (66000673).

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

66000666 is an admirable number.

66000666 is a modest number, since divided by 666 gives 66 as remainder.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5500050 + ... + 5500061.

It is an arithmetic number, because the mean of its divisors is an integer number (16500168).

Almost surely, 2^66000666 is an apocalyptic number.

66000666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66000666 is a wasteful number, since it uses less digits than its factorization.

66000666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11000116.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 66000666 is about 8124.0793939991. The cubic root of 66000666 is about 404.1253613838.

It can be divided in two parts, 66000 and 666, that added together give a palindrome (66666).

The spelling of 66000666 in words is "sixty-six million, six hundred sixty-six", and thus it is an aban number.