108660861 has 12 divisors (see below), whose sum is σ = 158846688. Its totient is φ = 71567304.

The previous prime is 108660803. The next prime is 108660863. The reversal of 108660861 is 168066801.

It is not a de Polignac number, because 108660861 - 2¹⁷ = 108529789 is a prime.

It is a super-2 number, since 2×108660861² = 23614365426522642, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108660863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71985 + ... + 73478.

It is an arithmetic number, because the mean of its divisors is an integer number (13237224).

Almost surely, 2^108660861 is an apocalyptic number.

It is an amenable number.

108660861 is a deficient number, since it is larger than the sum of its proper divisors (50185827).

108660861 is a wasteful number, since it uses less digits than its factorization.

108660861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145552 (or 145549 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 108660861 is about 10424.0520432316. The cubic root of 108660861 is about 477.1896849855.

It can be divided in two parts, 108 and 660861, that added together give a square (660969 = 813²).

The spelling of 108660861 in words is "one hundred eight million, six hundred sixty thousand, eight hundred sixty-one".