664436306607446 has 64 divisors (see below), whose sum is σ = 1011207751868160. Its totient is φ = 327410403166080.

The previous prime is 664436306607397. The next prime is 664436306607481. The reversal of 664436306607446 is 644706603634466.

664436306607446 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43069695185 + ... + 43069710611.

It is an arithmetic number, because the mean of its divisors is an integer number (15800121122940).

Almost surely, 2^{664436306607446} is an apocalyptic number.

664436306607446 is a deficient number, since it is larger than the sum of its proper divisors (346771445260714).

664436306607446 is a wasteful number, since it uses less digits than its factorization.

664436306607446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17549.

The product of its (nonzero) digits is 752467968, while the sum is 65.

The spelling of 664436306607446 in words is "six hundred sixty-four trillion, four hundred thirty-six billion, three hundred six million, six hundred seven thousand, four hundred forty-six".