211671660166 has 8 divisors (see below), whose sum is σ = 319261675824. Its totient is φ = 105251101560.

The previous prime is 211671660149. The next prime is 211671660199. The reversal of 211671660166 is 661066176112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×211671660166² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 292363810 + ... + 292364533.

It is an arithmetic number, because the mean of its divisors is an integer number (39907709478).

Almost surely, 2^211671660166 is an apocalyptic number.

211671660166 is a deficient number, since it is larger than the sum of its proper divisors (107590015658).

211671660166 is a wasteful number, since it uses less digits than its factorization.

211671660166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584728526.

The product of its (nonzero) digits is 108864, while the sum is 43.

The spelling of 211671660166 in words is "two hundred eleven billion, six hundred seventy-one million, six hundred sixty thousand, one hundred sixty-six".