664466442265 has 8 divisors (see below), whose sum is σ = 802640259648. Its totient is φ = 528052801200.

The previous prime is 664466442259. The next prime is 664466442331. The reversal of 664466442265 is 562244664466.

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

It is not a de Polignac number, because 664466442265 - 2³ = 664466442257 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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 440043247 + ... + 440044756.

It is an arithmetic number, because the mean of its divisors is an integer number (100330032456).

Almost surely, 2^664466442265 is an apocalyptic number.

It is an amenable number.

664466442265 is a deficient number, since it is larger than the sum of its proper divisors (138173817383).

664466442265 is a wasteful number, since it uses less digits than its factorization.

664466442265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880088159.

The product of its digits is 39813120, while the sum is 55.

The spelling of 664466442265 in words is "six hundred sixty-four billion, four hundred sixty-six million, four hundred forty-two thousand, two hundred sixty-five".