616656 has 40 divisors (see below), whose sum is σ = 1651680. Its totient is φ = 198016.

The previous prime is 616643. The next prime is 616669. The reversal of 616656 is 656616.

It is an interprime number because it is at equal distance from previous prime (616643) and next prime (616669).

It is a congruent number.

It is an unprimeable number.

616656 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1171 + ... + 1613.

It is an arithmetic number, because the mean of its divisors is an integer number (41292).

2⁶¹⁶⁶⁵⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 616656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (825840).

616656 is an abundant number, since it is smaller than the sum of its proper divisors (1035024).

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

616656 is a wasteful number, since it uses less digits than its factorization.

616656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483 (or 477 counting only the distinct ones).

The product of its digits is 6480, while the sum is 30.

The square root of 616656 is about 785.2744743082. The cubic root of 616656 is about 85.1166104234.

The spelling of 616656 in words is "six hundred sixteen thousand, six hundred fifty-six".