66192910655 has 16 divisors (see below), whose sum is σ = 80478074880. Its totient is φ = 52257293088.

The previous prime is 66192910649. The next prime is 66192910681. The reversal of 66192910655 is 55601929166.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66192910655 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 (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 749354 + ... + 833016.

It is an arithmetic number, because the mean of its divisors is an integer number (5029879680).

Almost surely, 2^66192910655 is an apocalyptic number.

66192910655 is a deficient number, since it is larger than the sum of its proper divisors (14285164225).

66192910655 is a wasteful number, since it uses less digits than its factorization.

66192910655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85750.

The product of its (nonzero) digits is 874800, while the sum is 50.

The spelling of 66192910655 in words is "sixty-six billion, one hundred ninety-two million, nine hundred ten thousand, six hundred fifty-five".