66766773340 has 24 divisors (see below), whose sum is σ = 140222275200. Its totient is φ = 26704413888.

The previous prime is 66766773323. The next prime is 66766773343. The reversal of 66766773340 is 4337766766.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66766773343) 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 7 ways as a sum of consecutive naturals, for example, 105589 + ... + 380371.

It is an arithmetic number, because the mean of its divisors is an integer number (5842594800).

Almost surely, 2^66766773340 is an apocalyptic number.

It is an amenable number.

66766773340 is an abundant number, since it is smaller than the sum of its proper divisors (73455501860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66766773340 is a wasteful number, since it uses less digits than its factorization.

66766773340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286941 (or 286939 counting only the distinct ones).

The product of its (nonzero) digits is 16003008, while the sum is 55.

The spelling of 66766773340 in words is "sixty-six billion, seven hundred sixty-six million, seven hundred seventy-three thousand, three hundred forty".