66654031633 has 8 divisors (see below), whose sum is σ = 76180421952. Its totient is φ = 57128737776.

The previous prime is 66654031627. The next prime is 66654031679. The reversal of 66654031633 is 33613045666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66654031633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66654031633.

It is not an unprimeable number, because it can be changed into a prime (66654031733) 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 7 ways as a sum of consecutive naturals, for example, 139435 + ... + 390832.

It is an arithmetic number, because the mean of its divisors is an integer number (9522552744).

Almost surely, 2^66654031633 is an apocalyptic number.

It is an amenable number.

66654031633 is a deficient number, since it is larger than the sum of its proper divisors (9526390319).

66654031633 is a wasteful number, since it uses less digits than its factorization.

66654031633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548231.

The product of its (nonzero) digits is 699840, while the sum is 43.

The spelling of 66654031633 in words is "sixty-six billion, six hundred fifty-four million, thirty-one thousand, six hundred thirty-three".