664801784307 has 6 divisors (see below), whose sum is σ = 960269244012. Its totient is φ = 443201189532.

The previous prime is 664801784299. The next prime is 664801784363. The reversal of 664801784307 is 703487108466.

664801784307 is a `hidden beast` number, since 6 + 64 + 80 + 1 + 78 + 430 + 7 = 666.

664801784307 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 664801784307 - 2³ = 664801784299 is a prime.

It is a super-2 number, since 2×664801784307² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (664801784807) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36933432453 + ... + 36933432470.

It is an arithmetic number, because the mean of its divisors is an integer number (160044874002).

Almost surely, 2^664801784307 is an apocalyptic number.

664801784307 is a deficient number, since it is larger than the sum of its proper divisors (295467459705).

664801784307 is a wasteful number, since it uses less digits than its factorization.

664801784307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73866864929 (or 73866864926 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 54.

The spelling of 664801784307 in words is "six hundred sixty-four billion, eight hundred one million, seven hundred eighty-four thousand, three hundred seven".