66555550610 has 16 divisors (see below), whose sum is σ = 119904095232. Its totient is φ = 26599086000.

The previous prime is 66555550603. The next prime is 66555550667. The reversal of 66555550610 is 1605555566.

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, 2879696 + ... + 2902715.

It is an arithmetic number, because the mean of its divisors is an integer number (7494005952).

Almost surely, 2^66555550610 is an apocalyptic number.

66555550610 is a deficient number, since it is larger than the sum of its proper divisors (53348544622).

66555550610 is a wasteful number, since it uses less digits than its factorization.

66555550610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5783569.

The product of its (nonzero) digits is 675000, while the sum is 44.

The spelling of 66555550610 in words is "sixty-six billion, five hundred fifty-five million, five hundred fifty thousand, six hundred ten".