66786670 has 8 divisors (see below), whose sum is σ = 120216024. Its totient is φ = 26714664.

The previous prime is 66786649. The next prime is 66786689. The reversal of 66786670 is 7668766.

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 66786670.

It is a congruent number.

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, 3339324 + ... + 3339343.

It is an arithmetic number, because the mean of its divisors is an integer number (15027003).

Almost surely, 2^66786670 is an apocalyptic number.

66786670 is a deficient number, since it is larger than the sum of its proper divisors (53429354).

66786670 is a wasteful number, since it uses less digits than its factorization.

66786670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6678674.

The product of its (nonzero) digits is 508032, while the sum is 46.

The square root of 66786670 is about 8172.3111786079. The cubic root of 66786670 is about 405.7232820409.

The spelling of 66786670 in words is "sixty-six million, seven hundred eighty-six thousand, six hundred seventy".