1664660466446 has 8 divisors (see below), whose sum is σ = 2528598177120. Its totient is φ = 821794407408.

The previous prime is 1664660466407. The next prime is 1664660466449. The reversal of 1664660466446 is 6446640664661.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664660466449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5267912711 + ... + 5267913026.

It is an arithmetic number, because the mean of its divisors is an integer number (316074772140).

Almost surely, 2^{1664660466446} is an apocalyptic number.

1664660466446 is a deficient number, since it is larger than the sum of its proper divisors (863937710674).

1664660466446 is a wasteful number, since it uses less digits than its factorization.

1664660466446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10535825818.

The product of its (nonzero) digits is 71663616, while the sum is 59.

The spelling of 1664660466446 in words is "one trillion, six hundred sixty-four billion, six hundred sixty million, four hundred sixty-six thousand, four hundred forty-six".