140666 has 8 divisors (see below), whose sum is σ = 214644. Its totient is φ = 69120.

The previous prime is 140663. The next prime is 140677. The reversal of 140666 is 666041.

140666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 137641 + 3025 = 371^2 + 55^2 .

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

140666 is a modest number, since divided by 666 gives 140 as remainder.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (140663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455 + ... + 698.

2¹⁴⁰⁶⁶⁶ is an apocalyptic number.

140666 is a deficient number, since it is larger than the sum of its proper divisors (73978).

140666 is a wasteful number, since it uses less digits than its factorization.

140666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1216.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 140666 is about 375.0546626827. The cubic root of 140666 is about 52.0071489185.

The spelling of 140666 in words is "one hundred forty thousand, six hundred sixty-six".