664821003762 has 12 divisors (see below), whose sum is σ = 1440445508190. Its totient is φ = 221607001248.

The previous prime is 664821003751. The next prime is 664821003767. The reversal of 664821003762 is 267300128466.

664821003762 is a `hidden beast` number, since 6 + 6 + 482 + 100 + 3 + 7 + 62 = 666.

It can be written as a sum of positive squares in only one way, i.e., 650343860721 + 14477143041 = 806439^2 + 120321^2 .

It is a super-2 number, since 2×664821003762² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (664821003767) 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 5 ways as a sum of consecutive naturals, for example, 18467250087 + ... + 18467250122.

Almost surely, 2^664821003762 is an apocalyptic number.

664821003762 is an abundant number, since it is smaller than the sum of its proper divisors (775624504428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664821003762 is a wasteful number, since it uses less digits than its factorization.

664821003762 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36934500217 (or 36934500214 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 664821003762 in words is "six hundred sixty-four billion, eight hundred twenty-one million, three thousand, seven hundred sixty-two".