664354064061 has 24 divisors (see below), whose sum is σ = 1001571816960. Its totient is φ = 423550217376.

The previous prime is 664354064051. The next prime is 664354064063. The reversal of 664354064061 is 160460453466.

664354064061 is a `hidden beast` number, since 6 + 6 + 4 + 3 + 540 + 6 + 40 + 61 = 666.

It is not a de Polignac number, because 664354064061 - 2¹⁴ = 664354047677 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 664354063998 and 664354064016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664354064063) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 559675 + ... + 1281383.

It is an arithmetic number, because the mean of its divisors is an integer number (41732159040).

Almost surely, 2^664354064061 is an apocalyptic number.

It is an amenable number.

664354064061 is a deficient number, since it is larger than the sum of its proper divisors (337217752899).

664354064061 is a wasteful number, since it uses less digits than its factorization.

664354064061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726185 (or 726182 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 45.

The spelling of 664354064061 in words is "six hundred sixty-four billion, three hundred fifty-four million, sixty-four thousand, sixty-one".