664161490118 has 16 divisors (see below), whose sum is σ = 1142795135520. Its totient is φ = 283582493376.

The previous prime is 664161490079. The next prime is 664161490183. The reversal of 664161490118 is 811094161466.

It is a super-2 number, since 2×664161490118² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 88174871 + ... + 88182402.

It is an arithmetic number, because the mean of its divisors is an integer number (71424695970).

Almost surely, 2^664161490118 is an apocalyptic number.

664161490118 is a deficient number, since it is larger than the sum of its proper divisors (478633645402).

664161490118 is a wasteful number, since it uses less digits than its factorization.

664161490118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176357551.

The product of its (nonzero) digits is 248832, while the sum is 47.

The spelling of 664161490118 in words is "six hundred sixty-four billion, one hundred sixty-one million, four hundred ninety thousand, one hundred eighteen".