66364509707641 has 16 divisors (see below), whose sum is σ = 69338467114560. Its totient is φ = 63436360075200.

The previous prime is 66364509707591. The next prime is 66364509707647. The reversal of 66364509707641 is 14670790546366.

It is a cyclic number.

It is not a de Polignac number, because 66364509707641 - 2⁷ = 66364509707513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66364509707647) 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, 34333246 + ... + 36214648.

It is an arithmetic number, because the mean of its divisors is an integer number (4333654194660).

Almost surely, 2^{66364509707641} is an apocalyptic number.

It is an amenable number.

66364509707641 is a deficient number, since it is larger than the sum of its proper divisors (2973957406919).

66364509707641 is a wasteful number, since it uses less digits than its factorization.

66364509707641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1893576.

The product of its (nonzero) digits is 137168640, while the sum is 64.

The spelling of 66364509707641 in words is "sixty-six trillion, three hundred sixty-four billion, five hundred nine million, seven hundred seven thousand, six hundred forty-one".