66009633967 has 16 divisors (see below), whose sum is σ = 67628206240. Its totient is φ = 64409126400.

The previous prime is 66009633941. The next prime is 66009633983. The reversal of 66009633967 is 76933690066.

It is a cyclic number.

It is not a de Polignac number, because 66009633967 - 2¹⁵ = 66009601199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66009631967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14861467 + ... + 14865907.

It is an arithmetic number, because the mean of its divisors is an integer number (4226762890).

Almost surely, 2^66009633967 is an apocalyptic number.

66009633967 is a deficient number, since it is larger than the sum of its proper divisors (1618572273).

66009633967 is a wasteful number, since it uses less digits than its factorization.

66009633967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6394.

The product of its (nonzero) digits is 6613488, while the sum is 55.

The spelling of 66009633967 in words is "sixty-six billion, nine million, six hundred thirty-three thousand, nine hundred sixty-seven".