664447201277142 has 16 divisors (see below), whose sum is σ = 1338594361698672. Its totient is φ = 219865740568320.

The previous prime is 664447201277053. The next prime is 664447201277207. The reversal of 664447201277142 is 241772102744466.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 404164963459 + ... + 404164965102.

It is an arithmetic number, because the mean of its divisors is an integer number (83662147606167).

Almost surely, 2^{664447201277142} is an apocalyptic number.

664447201277142 is an abundant number, since it is smaller than the sum of its proper divisors (674147160421530).

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

664447201277142 is a wasteful number, since it uses less digits than its factorization.

664447201277142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808329928703.

The product of its (nonzero) digits is 25288704, while the sum is 57.

The spelling of 664447201277142 in words is "six hundred sixty-four trillion, four hundred forty-seven billion, two hundred one million, two hundred seventy-seven thousand, one hundred forty-two".