156866 has 8 divisors (see below), whose sum is σ = 241164. Its totient is φ = 76480.

The previous prime is 156841. The next prime is 156887. The reversal of 156866 is 668651.

It can be written as a sum of positive squares in 2 ways, for example, as 156025 + 841 = 395^2 + 29^2 .

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

It is a plaindrome in base 7.

It is a congruent number.

It is an unprimeable number.

156866 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 875 + ... + 1038.

2¹⁵⁶⁸⁶⁶ is an apocalyptic number.

156866 is a deficient number, since it is larger than the sum of its proper divisors (84298).

156866 is a wasteful number, since it uses less digits than its factorization.

156866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1956.

The product of its digits is 8640, while the sum is 32.

The square root of 156866 is about 396.0631262817. The cubic root of 156866 is about 53.9315548002.

The spelling of 156866 in words is "one hundred fifty-six thousand, eight hundred sixty-six".