66283943976 has 96 divisors (see below), whose sum is σ = 197119016640. Its totient is φ = 20794952448.

The previous prime is 66283943933. The next prime is 66283943981. The reversal of 66283943976 is 67934938266.

It is a super-2 number, since 2×66283943976² (a number of 22 digits) contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 969796 + ... + 1035891.

It is an arithmetic number, because the mean of its divisors is an integer number (2053323090).

Almost surely, 2^66283943976 is an apocalyptic number.

It is an amenable number.

66283943976 is an abundant number, since it is smaller than the sum of its proper divisors (130835072664).

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

66283943976 is a wasteful number, since it uses less digits than its factorization.

66283943976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2005725 (or 2005709 counting only the distinct ones).

The product of its digits is 70543872, while the sum is 63.

The spelling of 66283943976 in words is "sixty-six billion, two hundred eighty-three million, nine hundred forty-three thousand, nine hundred seventy-six".