66666682 has 8 divisors (see below), whose sum is σ = 100050516. Its totient is φ = 33316512.

The previous prime is 66666667. The next prime is 66666683. The reversal of 66666682 is 28666666.

It can be written as a sum of positive squares in 2 ways, for example, as 62710561 + 3956121 = 7919^2 + 1989^2 .

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 (66666683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2683 + ... + 11854.

Almost surely, 2^66666682 is an apocalyptic number.

66666682 is a deficient number, since it is larger than the sum of its proper divisors (33383834).

66666682 is a wasteful number, since it uses less digits than its factorization.

66666682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16832.

The product of its digits is 746496, while the sum is 46.

The square root of 66666682 is about 8164.9667482483. The cubic root of 66666682 is about 405.4801641250.

The spelling of 66666682 in words is "sixty-six million, six hundred sixty-six thousand, six hundred eighty-two".