664610043655743 has 32 divisors (see below), whose sum is σ = 920423119795200. Its totient is φ = 426062042749056.

The previous prime is 664610043655741. The next prime is 664610043655751. The reversal of 664610043655743 is 347556340016466.

It is a happy number.

It is not a de Polignac number, because 664610043655743 - 2¹ = 664610043655741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664610043655741) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12846778 + ... + 38655656.

It is an arithmetic number, because the mean of its divisors is an integer number (28763222493600).

Almost surely, 2^{664610043655743} is an apocalyptic number.

664610043655743 is a deficient number, since it is larger than the sum of its proper divisors (255813076139457).

664610043655743 is a wasteful number, since it uses less digits than its factorization.

664610043655743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25810111.

The product of its (nonzero) digits is 130636800, while the sum is 60.

The spelling of 664610043655743 in words is "six hundred sixty-four trillion, six hundred ten billion, forty-three million, six hundred fifty-five thousand, seven hundred forty-three".