616782166 has 64 divisors (see below), whose sum is σ = 1249468416. Its totient is φ = 220521600.

The previous prime is 616782149. The next prime is 616782167. The reversal of 616782166 is 661287616.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616782167) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 381576 + ... + 383188.

It is an arithmetic number, because the mean of its divisors is an integer number (19522944).

Almost surely, 2^616782166 is an apocalyptic number.

616782166 is an abundant number, since it is smaller than the sum of its proper divisors (632686250).

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

616782166 is a wasteful number, since it uses less digits than its factorization.

616782166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1837.

The product of its digits is 145152, while the sum is 43.

The square root of 616782166 is about 24835.0994763460. The cubic root of 616782166 is about 851.2241489674.

The spelling of 616782166 in words is "six hundred sixteen million, seven hundred eighty-two thousand, one hundred sixty-six".