664863002774 has 32 divisors (see below), whose sum is σ = 1019448180000. Its totient is φ = 325089716224.

The previous prime is 664863002773. The next prime is 664863002779. The reversal of 664863002774 is 477200368466.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664863002773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48491432 + ... + 48505140.

It is an arithmetic number, because the mean of its divisors is an integer number (31857755625).

Almost surely, 2^664863002774 is an apocalyptic number.

664863002774 is a deficient number, since it is larger than the sum of its proper divisors (354585177226).

664863002774 is a wasteful number, since it uses less digits than its factorization.

664863002774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15232.

The product of its (nonzero) digits is 8128512, while the sum is 53.

The spelling of 664863002774 in words is "six hundred sixty-four billion, eight hundred sixty-three million, two thousand, seven hundred seventy-four".