166120856 has 16 divisors (see below), whose sum is σ = 339792840. Its totient is φ = 75509440.

The previous prime is 166120831. The next prime is 166120891. The reversal of 166120856 is 658021661.

It is a happy number.

It is a super-2 number, since 2×166120856² = 55192277596345472, which contains 22 as substring.

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, 943781 + ... + 943956.

Almost surely, 2^166120856 is an apocalyptic number.

It is an amenable number.

166120856 is an abundant number, since it is smaller than the sum of its proper divisors (173671984).

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

166120856 is a wasteful number, since it uses less digits than its factorization.

166120856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1887754 (or 1887750 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 166120856 is about 12888.7879957737. The cubic root of 166120856 is about 549.7198087992.

The spelling of 166120856 in words is "one hundred sixty-six million, one hundred twenty thousand, eight hundred fifty-six".