661482150 has 192 divisors, whose sum is σ = 2005585920. Its totient is φ = 140918400.

The previous prime is 661482119. The next prime is 661482161. The reversal of 661482150 is 51284166.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1416217 + ... + 1416683.

It is an arithmetic number, because the mean of its divisors is an integer number (10445760).

Almost surely, 2^661482150 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 661482150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1002792960).

661482150 is an abundant number, since it is smaller than the sum of its proper divisors (1344103770).

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

661482150 is a wasteful number, since it uses less digits than its factorization.

661482150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579 (or 574 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 661482150 is about 25719.2952858355. The cubic root of 661482150 is about 871.3100227135.

The spelling of 661482150 in words is "six hundred sixty-one million, four hundred eighty-two thousand, one hundred fifty".