661350150 has 96 divisors (see below), whose sum is σ = 1929653280. Its totient is φ = 165980160.

The previous prime is 661350127. The next prime is 661350203. The reversal of 661350150 is 51053166.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8542 + ... + 37358.

It is an arithmetic number, because the mean of its divisors is an integer number (20100555).

Almost surely, 2^661350150 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 661350150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (964826640).

661350150 is an abundant number, since it is smaller than the sum of its proper divisors (1268303130).

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

661350150 is a wasteful number, since it uses less digits than its factorization.

661350150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28855 (or 28844 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 661350150 is about 25716.7289910673. The cubic root of 661350150 is about 871.2520616764.

The spelling of 661350150 in words is "six hundred sixty-one million, three hundred fifty thousand, one hundred fifty".