66743630 has 16 divisors (see below), whose sum is σ = 121005360. Its totient is φ = 26504832.

The previous prime is 66743629. The next prime is 66743641. The reversal of 66743630 is 3634766.

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 7 ways as a sum of consecutive naturals, for example, 22619 + ... + 25398.

It is an arithmetic number, because the mean of its divisors is an integer number (7562835).

Almost surely, 2^66743630 is an apocalyptic number.

66743630 is a deficient number, since it is larger than the sum of its proper divisors (54261730).

66743630 is a wasteful number, since it uses less digits than its factorization.

66743630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48163.

The product of its (nonzero) digits is 54432, while the sum is 35.

The square root of 66743630 is about 8169.6774722139. The cubic root of 66743630 is about 405.6361085448.

The spelling of 66743630 in words is "sixty-six million, seven hundred forty-three thousand, six hundred thirty".