664775532001 has 24 divisors (see below), whose sum is σ = 782923919424. Its totient is φ = 552786975360.

The previous prime is 664775531947. The next prime is 664775532013. The reversal of 664775532001 is 100235577466.

It is not a de Polignac number, because 664775532001 - 2³¹ = 662628048353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664775532901) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 2129410 + ... + 2421556.

It is an arithmetic number, because the mean of its divisors is an integer number (32621829976).

Almost surely, 2^664775532001 is an apocalyptic number.

664775532001 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

664775532001 is a deficient number, since it is larger than the sum of its proper divisors (118148387423).

664775532001 is an equidigital number, since it uses as much as digits as its factorization.

664775532001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292361 (or 292288 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 46.

The spelling of 664775532001 in words is "six hundred sixty-four billion, seven hundred seventy-five million, five hundred thirty-two thousand, one".