1663436330405 has 8 divisors (see below), whose sum is σ = 2011361181984. Its totient is φ = 1320590674000.

The previous prime is 1663436330371. The next prime is 1663436330417. The reversal of 1663436330405 is 5040336343661.

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

It is not a de Polignac number, because 1663436330405 - 2¹⁴ = 1663436314021 is a prime.

It is a super-2 number, since 2×1663436330405² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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, 1269798071 + ... + 1269799380.

It is an arithmetic number, because the mean of its divisors is an integer number (251420147748).

Almost surely, 2^{1663436330405} is an apocalyptic number.

It is an amenable number.

1663436330405 is a deficient number, since it is larger than the sum of its proper divisors (347924851579).

1663436330405 is a wasteful number, since it uses less digits than its factorization.

1663436330405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2539597587.

The product of its (nonzero) digits is 1399680, while the sum is 44.

The spelling of 1663436330405 in words is "one trillion, six hundred sixty-three billion, four hundred thirty-six million, three hundred thirty thousand, four hundred five".