66601859 has 8 divisors (see below), whose sum is σ = 73155840. Its totient is φ = 60352776.

The previous prime is 66601853. The next prime is 66601877. The reversal of 66601859 is 95810666.

66601859 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66601859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66601853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75767 + ... + 76640.

It is an arithmetic number, because the mean of its divisors is an integer number (9144480).

Almost surely, 2^66601859 is an apocalyptic number.

66601859 is a deficient number, since it is larger than the sum of its proper divisors (6553981).

66601859 is a wasteful number, since it uses less digits than its factorization.

66601859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152449.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 66601859 is about 8160.9962014450. The cubic root of 66601859 is about 405.3486993330.

The spelling of 66601859 in words is "sixty-six million, six hundred one thousand, eight hundred fifty-nine".