66105655 has 48 divisors (see below), whose sum is σ = 106047360. Its totient is φ = 39009600.

The previous prime is 66105647. The next prime is 66105679. The reversal of 66105655 is 55650166.

It is not a de Polignac number, because 66105655 - 2³ = 66105647 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66105655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 50560 + ... + 51850.

It is an arithmetic number, because the mean of its divisors is an integer number (2209320).

Almost surely, 2^66105655 is an apocalyptic number.

66105655 is a deficient number, since it is larger than the sum of its proper divisors (39941705).

66105655 is a wasteful number, since it uses less digits than its factorization.

66105655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340 (or 1333 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 66105655 is about 8130.5384200556. The cubic root of 66105655 is about 404.3395321516.

The spelling of 66105655 in words is "sixty-six million, one hundred five thousand, six hundred fifty-five".