66438030953 has 16 divisors (see below), whose sum is σ = 76393127040. Its totient is φ = 56599140096.

The previous prime is 66438030937. The next prime is 66438030991. The reversal of 66438030953 is 35903083466.

It is a cyclic number.

It is not a de Polignac number, because 66438030953 - 2⁴ = 66438030937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66438030898 and 66438030907.

It is not an unprimeable number, because it can be changed into a prime (66438030353) 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 15 ways as a sum of consecutive naturals, for example, 4702526 + ... + 4716632.

It is an arithmetic number, because the mean of its divisors is an integer number (4774570440).

Almost surely, 2^66438030953 is an apocalyptic number.

It is an amenable number.

66438030953 is a deficient number, since it is larger than the sum of its proper divisors (9955096087).

66438030953 is a wasteful number, since it uses less digits than its factorization.

66438030953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18176.

The product of its (nonzero) digits is 1399680, while the sum is 47.

The spelling of 66438030953 in words is "sixty-six billion, four hundred thirty-eight million, thirty thousand, nine hundred fifty-three".