664001516 has 12 divisors (see below), whose sum is σ = 1202071920. Its totient is φ = 320552400.

The previous prime is 664001497. The next prime is 664001561. The reversal of 664001516 is 615100466.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2861960 + ... + 2862191.

It is an arithmetic number, because the mean of its divisors is an integer number (100172660).

Almost surely, 2^664001516 is an apocalyptic number.

It is an amenable number.

664001516 is a deficient number, since it is larger than the sum of its proper divisors (538070404).

664001516 is a wasteful number, since it uses less digits than its factorization.

664001516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5724184 (or 5724182 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 664001516 is about 25768.2268695384. The cubic root of 664001516 is about 872.4147982362.

The spelling of 664001516 in words is "six hundred sixty-four million, one thousand, five hundred sixteen".