16665610605 has 32 divisors (see below), whose sum is σ = 30595719168. Its totient is φ = 7588200000.

The previous prime is 16665610589. The next prime is 16665610627. The reversal of 16665610605 is 50601656661.

16665610605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16665610605 - 2⁴ = 16665610589 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 289821 + ... + 342530.

It is an arithmetic number, because the mean of its divisors is an integer number (956116224).

Almost surely, 2^16665610605 is an apocalyptic number.

16665610605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16665610605 is a deficient number, since it is larger than the sum of its proper divisors (13930108563).

16665610605 is a wasteful number, since it uses less digits than its factorization.

16665610605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632617.

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 16665610605 in words is "sixteen billion, six hundred sixty-five million, six hundred ten thousand, six hundred five".