550128101666 has 32 divisors (see below), whose sum is σ = 1020480552000. Its totient is φ = 218674399680.

The previous prime is 550128101641. The next prime is 550128101671. The reversal of 550128101666 is 666101821055.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50613641 + ... + 50624508.

It is an arithmetic number, because the mean of its divisors is an integer number (31890017250).

Almost surely, 2^550128101666 is an apocalyptic number.

550128101666 is a deficient number, since it is larger than the sum of its proper divisors (470352450334).

550128101666 is a wasteful number, since it uses less digits than its factorization.

550128101666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101238194.

The product of its (nonzero) digits is 86400, while the sum is 41.

The spelling of 550128101666 in words is "five hundred fifty billion, one hundred twenty-eight million, one hundred one thousand, six hundred sixty-six".