664371343053835 has 16 divisors (see below), whose sum is σ = 800745722731872. Its totient is φ = 529165723852800.

The previous prime is 664371343053791. The next prime is 664371343053853. The reversal of 664371343053835 is 538350343173466.

It is a happy number.

It is not a de Polignac number, because 664371343053835 - 2⁷ = 664371343053707 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125963976 + ... + 131132245.

It is an arithmetic number, because the mean of its divisors is an integer number (50046607670742).

Almost surely, 2^{664371343053835} is an apocalyptic number.

664371343053835 is a deficient number, since it is larger than the sum of its proper divisors (136374379678037).

664371343053835 is a wasteful number, since it uses less digits than its factorization.

664371343053835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257098494.

The product of its (nonzero) digits is 195955200, while the sum is 61.

The spelling of 664371343053835 in words is "six hundred sixty-four trillion, three hundred seventy-one billion, three hundred forty-three million, fifty-three thousand, eight hundred thirty-five".