66631050 has 72 divisors (see below), whose sum is σ = 180015264. Its totient is φ = 17669280.

The previous prime is 66631039. The next prime is 66631051. The reversal of 66631050 is 5013666.

It is not an unprimeable number, because it can be changed into a prime (66631051) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 118069 + ... + 118631.

It is an arithmetic number, because the mean of its divisors is an integer number (2500212).

Almost surely, 2^66631050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66631050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90007632).

66631050 is an abundant number, since it is smaller than the sum of its proper divisors (113384214).

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

66631050 is a wasteful number, since it uses less digits than its factorization.

66631050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844 (or 836 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 66631050 is about 8162.7844513989. The cubic root of 66631050 is about 405.4079109215.

The spelling of 66631050 in words is "sixty-six million, six hundred thirty-one thousand, fifty".