66766233601 has 16 divisors (see below), whose sum is σ = 70593284608. Its totient is φ = 63046771200.

The previous prime is 66766233581. The next prime is 66766233607. The reversal of 66766233601 is 10633266766.

It is a cyclic number.

It is not a de Polignac number, because 66766233601 - 2¹⁵ = 66766200833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66766233607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1336465 + ... + 1385521.

It is an arithmetic number, because the mean of its divisors is an integer number (4412080288).

Almost surely, 2^66766233601 is an apocalyptic number.

It is an amenable number.

66766233601 is a deficient number, since it is larger than the sum of its proper divisors (3827051007).

66766233601 is a wasteful number, since it uses less digits than its factorization.

66766233601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50152.

The product of its (nonzero) digits is 979776, while the sum is 46.

The spelling of 66766233601 in words is "sixty-six billion, seven hundred sixty-six million, two hundred thirty-three thousand, six hundred one".