611066550 has 96 divisors (see below), whose sum is σ = 1561507200. Its totient is φ = 158054400.

The previous prime is 611066509. The next prime is 611066557. The reversal of 611066550 is 55660116.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611066557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1360726 + ... + 1361174.

It is an arithmetic number, because the mean of its divisors is an integer number (16265700).

Almost surely, 2^611066550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 611066550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (780753600).

611066550 is an abundant number, since it is smaller than the sum of its proper divisors (950440650).

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

611066550 is a wasteful number, since it uses less digits than its factorization.

611066550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718 (or 713 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 611066550 is about 24719.7603143720. The cubic root of 611066550 is about 848.5866014765.

The spelling of 611066550 in words is "six hundred eleven million, sixty-six thousand, five hundred fifty".