66780034 has 8 divisors (see below), whose sum is σ = 100233360. Its totient is φ = 33368916.

The previous prime is 66780031. The next prime is 66780047. The reversal of 66780034 is 43008766.

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 (66780031) by changing a digit.

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, 6244 + ... + 13135.

It is an arithmetic number, because the mean of its divisors is an integer number (12529170).

Almost surely, 2^66780034 is an apocalyptic number.

66780034 is a deficient number, since it is larger than the sum of its proper divisors (33453326).

66780034 is a wasteful number, since it uses less digits than its factorization.

66780034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21104.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 66780034 is about 8171.9051634243. The cubic root of 66780034 is about 405.7098438859.

The spelling of 66780034 in words is "sixty-six million, seven hundred eighty thousand, thirty-four".