1663206346506 has 16 divisors (see below), whose sum is σ = 3326530189824. Its totient is φ = 554382532704.

The previous prime is 1663206346433. The next prime is 1663206346517. The reversal of 1663206346506 is 6056436023661.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4711146 + ... + 5051861.

It is an arithmetic number, because the mean of its divisors is an integer number (207908136864).

Almost surely, 2^{1663206346506} is an apocalyptic number.

1663206346506 is an abundant number, since it is smaller than the sum of its proper divisors (1663323843318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1663206346506 is a wasteful number, since it uses less digits than its factorization.

1663206346506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9791405.

The product of its (nonzero) digits is 2799360, while the sum is 48.

The spelling of 1663206346506 in words is "one trillion, six hundred sixty-three billion, two hundred six million, three hundred forty-six thousand, five hundred six".