16659705405 has 32 divisors (see below), whose sum is σ = 30645909504. Its totient is φ = 7570253376.

The previous prime is 16659705383. The next prime is 16659705409. The reversal of 16659705405 is 50450795661.

It is not a de Polignac number, because 16659705405 - 2⁶ = 16659705341 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16659705409) 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 31 ways as a sum of consecutive naturals, for example, 457507 + ... + 492576.

It is an arithmetic number, because the mean of its divisors is an integer number (957684672).

Almost surely, 2^16659705405 is an apocalyptic number.

16659705405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16659705405 is a deficient number, since it is larger than the sum of its proper divisors (13986204099).

16659705405 is a wasteful number, since it uses less digits than its factorization.

16659705405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950265.

The product of its (nonzero) digits is 1134000, while the sum is 48.

The spelling of 16659705405 in words is "sixteen billion, six hundred fifty-nine million, seven hundred five thousand, four hundred five".