664887709141 has 16 divisors (see below), whose sum is σ = 712228990464. Its totient is φ = 619222754304.

The previous prime is 664887709139. The next prime is 664887709147. The reversal of 664887709141 is 141907788466.

It is not a de Polignac number, because 664887709141 - 2¹ = 664887709139 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 664887709141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664887709147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1384806 + ... + 1802071.

It is an arithmetic number, because the mean of its divisors is an integer number (44514311904).

Almost surely, 2^664887709141 is an apocalyptic number.

It is an amenable number.

664887709141 is a deficient number, since it is larger than the sum of its proper divisors (47341281323).

664887709141 is a wasteful number, since it uses less digits than its factorization.

664887709141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3187140.

The product of its (nonzero) digits is 16257024, while the sum is 61.

The spelling of 664887709141 in words is "six hundred sixty-four billion, eight hundred eighty-seven million, seven hundred nine thousand, one hundred forty-one".