66767039405 has 16 divisors (see below), whose sum is σ = 87413503104. Its totient is φ = 48552636480.

The previous prime is 66767039371. The next prime is 66767039441. The reversal of 66767039405 is 50493076766.

It is not a de Polignac number, because 66767039405 - 2¹⁸ = 66766777261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 495587 + ... + 615743.

It is an arithmetic number, because the mean of its divisors is an integer number (5463343944).

Almost surely, 2^66767039405 is an apocalyptic number.

It is an amenable number.

66767039405 is a deficient number, since it is larger than the sum of its proper divisors (20646463699).

66767039405 is a wasteful number, since it uses less digits than its factorization.

66767039405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130276.

The product of its (nonzero) digits is 5715360, while the sum is 53.

The spelling of 66767039405 in words is "sixty-six billion, seven hundred sixty-seven million, thirty-nine thousand, four hundred five".