664051653 has 48 divisors (see below), whose sum is σ = 1063920000. Its totient is φ = 397229184.

The previous prime is 664051639. The next prime is 664051679. The reversal of 664051653 is 356150466.

664051653 is a `hidden beast` number, since 6 + 640 + 5 + 1 + 6 + 5 + 3 = 666.

It is not a de Polignac number, because 664051653 - 2¹⁴ = 664035269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664051153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 427923 + ... + 429471.

It is an arithmetic number, because the mean of its divisors is an integer number (22165000).

Almost surely, 2^664051653 is an apocalyptic number.

It is an amenable number.

664051653 is a deficient number, since it is larger than the sum of its proper divisors (399868347).

664051653 is a wasteful number, since it uses less digits than its factorization.

664051653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1706 (or 1703 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 664051653 is about 25769.1996965369. The cubic root of 664051653 is about 872.4367555956.

The spelling of 664051653 in words is "six hundred sixty-four million, fifty-one thousand, six hundred fifty-three".