664566046 has 8 divisors (see below), whose sum is σ = 1015657704. Its totient is φ = 326013480.

The previous prime is 664566043. The next prime is 664566053. The reversal of 664566046 is 640665466.

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

It is a junction number, because it is equal to n+sod(n) for n = 664565993 and 664566011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664566043) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3134640 + ... + 3134851.

It is an arithmetic number, because the mean of its divisors is an integer number (126957213).

Almost surely, 2^664566046 is an apocalyptic number.

664566046 is a deficient number, since it is larger than the sum of its proper divisors (351091658).

664566046 is a wasteful number, since it uses less digits than its factorization.

664566046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6269546.

The product of its (nonzero) digits is 622080, while the sum is 43.

The square root of 664566046 is about 25779.1785361753. The cubic root of 664566046 is about 872.6619687648.

The spelling of 664566046 in words is "six hundred sixty-four million, five hundred sixty-six thousand, forty-six".