66975277842 has 160 divisors (see below), whose sum is σ = 177579065664. Its totient is φ = 18635443200.

The previous prime is 66975277793. The next prime is 66975277861. The reversal of 66975277842 is 24877257966.

66975277842 is a `hidden beast` number, since 6 + 69 + 7 + 527 + 7 + 8 + 42 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 66975277842.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1215093 + ... + 1269015.

Almost surely, 2^66975277842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66975277842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88789532832).

66975277842 is an abundant number, since it is smaller than the sum of its proper divisors (110603787822).

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

66975277842 is a wasteful number, since it uses less digits than its factorization.

66975277842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54006 (or 53997 counting only the distinct ones).

The product of its digits is 71124480, while the sum is 63.

The spelling of 66975277842 in words is "sixty-six billion, nine hundred seventy-five million, two hundred seventy-seven thousand, eight hundred forty-two".