101866 has 12 divisors (see below), whose sum is σ = 160866. Its totient is φ = 48360.

The previous prime is 101863. The next prime is 101869. The reversal of 101866 is 668101.

It is an interprime number because it is at equal distance from previous prime (101863) and next prime (101869).

It can be written as a sum of positive squares in only one way, i.e., 77841 + 24025 = 279^2 + 155^2 .

It is not an unprimeable number, because it can be changed into a prime (101863) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1896 + ... + 1948.

2¹⁰¹⁸⁶⁶ is an apocalyptic number.

101866 is a deficient number, since it is larger than the sum of its proper divisors (59000).

101866 is an equidigital number, since it uses as much as digits as its factorization.

101866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 101866 is about 319.1645343706. The cubic root of 101866 is about 46.7028177927.

Adding to 101866 its reverse (668101), we get a palindrome (769967).

It can be divided in two parts, 10186 and 6, that multiplied together give a palindrome (61116).

The spelling of 101866 in words is "one hundred one thousand, eight hundred sixty-six".