664801623333 has 6 divisors (see below), whose sum is σ = 960269011494. Its totient is φ = 443201082216.

The previous prime is 664801623319. The next prime is 664801623371. The reversal of 664801623333 is 333326108466.

664801623333 is a `hidden beast` number, since 6 + 6 + 480 + 162 + 3 + 3 + 3 + 3 = 666.

664801623333 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 566056102689 + 98745520644 = 752367^2 + 314238^2 .

It is not a de Polignac number, because 664801623333 - 2¹⁴ = 664801606949 is a prime.

It is a super-2 number, since 2×664801623333² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664801623313) 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, 36933423510 + ... + 36933423527.

It is an arithmetic number, because the mean of its divisors is an integer number (160044835249).

Almost surely, 2^664801623333 is an apocalyptic number.

It is an amenable number.

664801623333 is a deficient number, since it is larger than the sum of its proper divisors (295467388161).

664801623333 is a wasteful number, since it uses less digits than its factorization.

664801623333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73866847043 (or 73866847040 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 45.

The spelling of 664801623333 in words is "six hundred sixty-four billion, eight hundred one million, six hundred twenty-three thousand, three hundred thirty-three".