361666 has 8 divisors (see below), whose sum is σ = 550800. Its totient is φ = 178068.

The previous prime is 361663. The next prime is 361679. The reversal of 361666 is 666163.

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

It is not an unprimeable number, because it can be changed into a prime (361663) by changing a digit.

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, 1216 + ... + 1483.

It is an arithmetic number, because the mean of its divisors is an integer number (68850).

2³⁶¹⁶⁶⁶ is an apocalyptic number.

361666 is a deficient number, since it is larger than the sum of its proper divisors (189134).

361666 is a wasteful number, since it uses less digits than its factorization.

361666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2768.

The product of its digits is 3888, while the sum is 28.

The square root of 361666 is about 601.3867308147. The cubic root of 361666 is about 71.2474339899.

The spelling of 361666 in words is "three hundred sixty-one thousand, six hundred sixty-six".