646066159 has 4 divisors (see below), whose sum is σ = 674156016. Its totient is φ = 617976304.

The previous prime is 646066129. The next prime is 646066207. The reversal of 646066159 is 951660646.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 646066159 - 2¹³ = 646057967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646066129) 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, 14044894 + ... + 14044939.

It is an arithmetic number, because the mean of its divisors is an integer number (168539004).

Almost surely, 2^646066159 is an apocalyptic number.

646066159 is a deficient number, since it is larger than the sum of its proper divisors (28089857).

646066159 is a wasteful number, since it uses less digits than its factorization.

646066159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28089856.

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 646066159 is about 25417.8315164768. The cubic root of 646066159 is about 864.4880568553.

The spelling of 646066159 in words is "six hundred forty-six million, sixty-six thousand, one hundred fifty-nine".