1664146017663 has 8 divisors (see below), whose sum is σ = 2315333589888. Its totient is φ = 1061194561944.

The previous prime is 1664146017649. The next prime is 1664146017679. The reversal of 1664146017663 is 3667106414661.

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

It is not a de Polignac number, because 1664146017663 - 2⁴ = 1664146017647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664146017263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12059029045 + ... + 12059029182.

It is an arithmetic number, because the mean of its divisors is an integer number (289416698736).

Almost surely, 2^{1664146017663} is an apocalyptic number.

1664146017663 is a deficient number, since it is larger than the sum of its proper divisors (651187572225).

1664146017663 is a wasteful number, since it uses less digits than its factorization.

1664146017663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24118058253.

The product of its (nonzero) digits is 2612736, while the sum is 51.

The spelling of 1664146017663 in words is "one trillion, six hundred sixty-four billion, one hundred forty-six million, seventeen thousand, six hundred sixty-three".