866667156 has 12 divisors (see below), whose sum is σ = 2022223392. Its totient is φ = 288889048.

The previous prime is 866667127. The next prime is 866667181. The reversal of 866667156 is 651766668.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×866667156² = 1502223918578256672, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 866667099 and 866667108.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36111120 + ... + 36111143.

It is an arithmetic number, because the mean of its divisors is an integer number (168518616).

Almost surely, 2^866667156 is an apocalyptic number.

It is an amenable number.

866667156 is an abundant number, since it is smaller than the sum of its proper divisors (1155556236).

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

866667156 is a wasteful number, since it uses less digits than its factorization.

866667156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72222270 (or 72222268 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 51.

The square root of 866667156 is about 29439.2111986717. The cubic root of 866667156 is about 953.4196814328.

The spelling of 866667156 in words is "eight hundred sixty-six million, six hundred sixty-seven thousand, one hundred fifty-six".