664013061 has 12 divisors (see below), whose sum is σ = 960687520. Its totient is φ = 441956520.

The previous prime is 664013041. The next prime is 664013099. The reversal of 664013061 is 160310466.

664013061 is a `hidden beast` number, since 6 + 640 + 13 + 0 + 6 + 1 = 666.

It is not a de Polignac number, because 664013061 - 2⁹ = 664012549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664013011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54025 + ... + 65166.

Almost surely, 2^664013061 is an apocalyptic number.

It is an amenable number.

664013061 is a deficient number, since it is larger than the sum of its proper divisors (296674459).

664013061 is a wasteful number, since it uses less digits than its factorization.

664013061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119816 (or 119813 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 664013061 is about 25768.4508847544. The cubic root of 664013061 is about 872.4198544347.

It can be divided in two parts, 6640 and 13061, that added together give a triangular number (19701 = T₁₉₈).

The spelling of 664013061 in words is "six hundred sixty-four million, thirteen thousand, sixty-one".