664646462 has 16 divisors (see below), whose sum is σ = 1001766480. Its totient is φ = 330728832.

The previous prime is 664646459. The next prime is 664646519. The reversal of 664646462 is 264646466.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 658214 + ... + 659222.

It is an arithmetic number, because the mean of its divisors is an integer number (62610405).

Almost surely, 2^664646462 is an apocalyptic number.

664646462 is a deficient number, since it is larger than the sum of its proper divisors (337120018).

664646462 is a wasteful number, since it uses less digits than its factorization.

664646462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2267.

The product of its digits is 995328, while the sum is 44.

The square root of 664646462 is about 25780.7381973442. The cubic root of 664646462 is about 872.6971662469.

The spelling of 664646462 in words is "six hundred sixty-four million, six hundred forty-six thousand, four hundred sixty-two".