66787682 has 8 divisors (see below), whose sum is σ = 107887836. Its totient is φ = 30825072.

The previous prime is 66787663. The next prime is 66787687. The reversal of 66787682 is 28678766.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 66601921 + 185761 = 8161^2 + 431^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 66787682.

It is not an unprimeable number, because it can be changed into a prime (66787687) 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, 1284353 + ... + 1284404.

Almost surely, 2^66787682 is an apocalyptic number.

66787682 is a deficient number, since it is larger than the sum of its proper divisors (41100154).

66787682 is a wasteful number, since it uses less digits than its factorization.

66787682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2568772.

The product of its digits is 1354752, while the sum is 50.

The square root of 66787682 is about 8172.3730947626. The cubic root of 66787682 is about 405.7253313016.

The spelling of 66787682 in words is "sixty-six million, seven hundred eighty-seven thousand, six hundred eighty-two".