661150 has 24 divisors (see below), whose sum is σ = 1406160. Its totient is φ = 226560.

The previous prime is 661139. The next prime is 661183. The reversal of 661150 is 51166.

661150 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 595 + ... + 1294.

It is an arithmetic number, because the mean of its divisors is an integer number (58590).

2⁶⁶¹¹⁵⁰ is an apocalyptic number.

661150 is an abundant number, since it is smaller than the sum of its proper divisors (745010).

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

661150 is a wasteful number, since it uses less digits than its factorization.

661150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1908 (or 1903 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 661150 is about 813.1113084935. Note that the first 3 decimals coincide. The cubic root of 661150 is about 87.1164161344.

The spelling of 661150 in words is "six hundred sixty-one thousand, one hundred fifty".