664787241305 has 16 divisors (see below), whose sum is σ = 880752083904. Its totient is φ = 477656546880.

The previous prime is 664787241301. The next prime is 664787241361. The reversal of 664787241305 is 503142787466.

It is not a de Polignac number, because 664787241305 - 2² = 664787241301 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664787241301) 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 15 ways as a sum of consecutive naturals, for example, 72808934 + ... + 72818063.

It is an arithmetic number, because the mean of its divisors is an integer number (55047005244).

Almost surely, 2^664787241305 is an apocalyptic number.

It is an amenable number.

664787241305 is a deficient number, since it is larger than the sum of its proper divisors (215964842599).

664787241305 is a wasteful number, since it uses less digits than its factorization.

664787241305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145627096.

The product of its (nonzero) digits is 6773760, while the sum is 53.

The spelling of 664787241305 in words is "six hundred sixty-four billion, seven hundred eighty-seven million, two hundred forty-one thousand, three hundred five".