66083978142 has 80 divisors (see below), whose sum is σ = 182248732512. Its totient is φ = 17428737600.

The previous prime is 66083978141. The next prime is 66083978159. The reversal of 66083978142 is 24187938066.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66083978141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2226609 + ... + 2256092.

Almost surely, 2^66083978142 is an apocalyptic number.

66083978142 is an abundant number, since it is smaller than the sum of its proper divisors (116164754370).

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

66083978142 is a wasteful number, since it uses less digits than its factorization.

66083978142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4482735 (or 4482726 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 66083978142 in words is "sixty-six billion, eighty-three million, nine hundred seventy-eight thousand, one hundred forty-two".