666155110206 has 64 divisors (see below), whose sum is σ = 1486940371200. Its totient is φ = 197722031616.

The previous prime is 666155110199. The next prime is 666155110277. The reversal of 666155110206 is 602011551666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1199616 + ... + 1664748.

It is an arithmetic number, because the mean of its divisors is an integer number (23233443300).

Almost surely, 2^666155110206 is an apocalyptic number.

666155110206 is an abundant number, since it is smaller than the sum of its proper divisors (820785260994).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666155110206 is a wasteful number, since it uses less digits than its factorization.

666155110206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465913.

The product of its (nonzero) digits is 64800, while the sum is 39.

The spelling of 666155110206 in words is "six hundred sixty-six billion, one hundred fifty-five million, one hundred ten thousand, two hundred six".