661614 has 8 divisors (see below), whose sum is σ = 1323240. Its totient is φ = 220536.

The previous prime is 661613. The next prime is 661621. The reversal of 661614 is 416166.

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

661614 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 661614.

It is not an unprimeable number, because it can be changed into a prime (661613) 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, 55129 + ... + 55140.

It is an arithmetic number, because the mean of its divisors is an integer number (165405).

2⁶⁶¹⁶¹⁴ is an apocalyptic number.

661614 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

661614 is a wasteful number, since it uses less digits than its factorization.

661614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110274.

The product of its digits is 864, while the sum is 24.

The square root of 661614 is about 813.3965822402. The cubic root of 661614 is about 87.1367910189.

It can be divided in two parts, 661 and 614, that added together give a triangular number (1275 = T₅₀).

The spelling of 661614 in words is "six hundred sixty-one thousand, six hundred fourteen".