66045630 has 96 divisors (see below), whose sum is σ = 186157440. Its totient is φ = 14952000.

The previous prime is 66045619. The next prime is 66045631. The reversal of 66045630 is 3654066.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66045631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 263005 + ... + 263255.

It is an arithmetic number, because the mean of its divisors is an integer number (1939140).

Almost surely, 2^66045630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66045630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93078720).

66045630 is an abundant number, since it is smaller than the sum of its proper divisors (120111810).

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

66045630 is a wasteful number, since it uses less digits than its factorization.

66045630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454 (or 447 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 66045630 is about 8126.8462517757. The cubic root of 66045630 is about 404.2171128209.

Adding to 66045630 its reverse (3654066), we get a palindrome (69699696).

The spelling of 66045630 in words is "sixty-six million, forty-five thousand, six hundred thirty".