66633247490 has 32 divisors (see below), whose sum is σ = 122855526144. Its totient is φ = 26008738560.

The previous prime is 66633247469. The next prime is 66633247529. The reversal of 66633247490 is 9474233666.

It is a Curzon 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 15 ways as a sum of consecutive naturals, for example, 51956 + ... + 368735.

It is an arithmetic number, because the mean of its divisors is an integer number (3839235192).

Almost surely, 2^66633247490 is an apocalyptic number.

66633247490 is a deficient number, since it is larger than the sum of its proper divisors (56222278654).

66633247490 is a wasteful number, since it uses less digits than its factorization.

66633247490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421082.

The product of its (nonzero) digits is 3919104, while the sum is 50.

The spelling of 66633247490 in words is "sixty-six billion, six hundred thirty-three million, two hundred forty-seven thousand, four hundred ninety".