66734033661 has 12 divisors (see below), whose sum is σ = 96396460992. Its totient is φ = 44488037256.

The previous prime is 66734033633. The next prime is 66734033687. The reversal of 66734033661 is 16633043766.

It is not a de Polignac number, because 66734033661 - 2¹⁰ = 66734032637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66734033761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 285580 + ... + 463706.

It is an arithmetic number, because the mean of its divisors is an integer number (8033038416).

Almost surely, 2^66734033661 is an apocalyptic number.

It is an amenable number.

66734033661 is a deficient number, since it is larger than the sum of its proper divisors (29662427331).

66734033661 is a wasteful number, since it uses less digits than its factorization.

66734033661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219760 (or 219757 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 45.

The spelling of 66734033661 in words is "sixty-six billion, seven hundred thirty-four million, thirty-three thousand, six hundred sixty-one".