66766803832 has 32 divisors (see below), whose sum is σ = 125584945920. Its totient is φ = 33277569120.

The previous prime is 66766803749. The next prime is 66766803839. The reversal of 66766803832 is 23830866766.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66766803839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9776403 + ... + 9783229.

It is an arithmetic number, because the mean of its divisors is an integer number (3924529560).

Almost surely, 2^66766803832 is an apocalyptic number.

It is an amenable number.

66766803832 is a deficient number, since it is larger than the sum of its proper divisors (58818142088).

66766803832 is a wasteful number, since it uses less digits than its factorization.

66766803832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10531 (or 10527 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 55.

The spelling of 66766803832 in words is "sixty-six billion, seven hundred sixty-six million, eight hundred three thousand, eight hundred thirty-two".