664614664682 has 8 divisors (see below), whose sum is σ = 1031298617700. Its totient is φ = 320848458784.

The previous prime is 664614664673. The next prime is 664614664729. The reversal of 664614664682 is 286466416466.

It can be written as a sum of positive squares in 2 ways, for example, as 664533105721 + 81558961 = 815189^2 + 9031^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×664614664682² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5729436707 + ... + 5729436822.

Almost surely, 2^664614664682 is an apocalyptic number.

664614664682 is a deficient number, since it is larger than the sum of its proper divisors (366683953018).

664614664682 is a wasteful number, since it uses less digits than its factorization.

664614664682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11458873560.

The product of its digits is 47775744, while the sum is 59.

The spelling of 664614664682 in words is "six hundred sixty-four billion, six hundred fourteen million, six hundred sixty-four thousand, six hundred eighty-two".