616646 has 4 divisors (see below), whose sum is σ = 924972. Its totient is φ = 308322.

The previous prime is 616643. The next prime is 616669. The reversal of 616646 is 646616.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154160 + ... + 154163.

It is an arithmetic number, because the mean of its divisors is an integer number (231243).

2⁶¹⁶⁶⁴⁶ is an apocalyptic number.

616646 is a deficient number, since it is larger than the sum of its proper divisors (308326).

616646 is a wasteful number, since it uses less digits than its factorization.

616646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308325.

The product of its digits is 5184, while the sum is 29.

The square root of 616646 is about 785.2681070819. The cubic root of 616646 is about 85.1161503231.

The spelling of 616646 in words is "six hundred sixteen thousand, six hundred forty-six".