666857214111 has 16 divisors (see below), whose sum is σ = 988275530880. Its totient is φ = 396530303520.

The previous prime is 666857214047. The next prime is 666857214119. The reversal of 666857214111 is 111412758666.

666857214111 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 666857214111 - 2⁶ = 666857214047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666857214119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190637821 + ... + 190641318.

It is an arithmetic number, because the mean of its divisors is an integer number (61767220680).

Almost surely, 2^666857214111 is an apocalyptic number.

666857214111 is a deficient number, since it is larger than the sum of its proper divisors (321418316769).

666857214111 is a wasteful number, since it uses less digits than its factorization.

666857214111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381279206.

The product of its digits is 483840, while the sum is 48.

The spelling of 666857214111 in words is "six hundred sixty-six billion, eight hundred fifty-seven million, two hundred fourteen thousand, one hundred eleven".