856666551206 has 8 divisors (see below), whose sum is σ = 1312340248800. Its totient is φ = 419219801608.

The previous prime is 856666551157. The next prime is 856666551227. The reversal of 856666551206 is 602155666658.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4556736881 + ... + 4556737068.

It is an arithmetic number, because the mean of its divisors is an integer number (164042531100).

Almost surely, 2^856666551206 is an apocalyptic number.

856666551206 is a deficient number, since it is larger than the sum of its proper divisors (455673697594).

856666551206 is a wasteful number, since it uses less digits than its factorization.

856666551206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9113473998.

The product of its (nonzero) digits is 15552000, while the sum is 56.

The spelling of 856666551206 in words is "eight hundred fifty-six billion, six hundred sixty-six million, five hundred fifty-one thousand, two hundred six".