66820682 has 8 divisors (see below), whose sum is σ = 105506400. Its totient is φ = 31651884.

The previous prime is 66820679. The next prime is 66820711. The reversal of 66820682 is 28602866.

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

It is a Harshad number since it is a multiple of its sum of digits (38), and also a Moran number because the ratio is a prime number: 1758439 = 66820682 / (6 + 6 + 8 + 2 + 0 + 6 + 8 + 2).

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, 879182 + ... + 879257.

It is an arithmetic number, because the mean of its divisors is an integer number (13188300).

Almost surely, 2^66820682 is an apocalyptic number.

66820682 is a deficient number, since it is larger than the sum of its proper divisors (38685718).

66820682 is a wasteful number, since it uses less digits than its factorization.

66820682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1758460.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 66820682 is about 8174.3918428223. The cubic root of 66820682 is about 405.7921436786.

The spelling of 66820682 in words is "sixty-six million, eight hundred twenty thousand, six hundred eighty-two".