66228820842 has 16 divisors (see below), whose sum is σ = 133223294880. Its totient is φ = 21948664752.

The previous prime is 66228820841. The next prime is 66228820871. The reversal of 66228820842 is 24802882266.

It is a junction number, because it is equal to n+sod(n) for n = 66228820791 and 66228820800.

It is not an unprimeable number, because it can be changed into a prime (66228820841) 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, 31901092 + ... + 31903167.

It is an arithmetic number, because the mean of its divisors is an integer number (8326455930).

Almost surely, 2^66228820842 is an apocalyptic number.

66228820842 is an abundant number, since it is smaller than the sum of its proper divisors (66994474038).

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

66228820842 is a wasteful number, since it uses less digits than its factorization.

66228820842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63804437.

The product of its (nonzero) digits is 1179648, while the sum is 48.

The spelling of 66228820842 in words is "sixty-six billion, two hundred twenty-eight million, eight hundred twenty thousand, eight hundred forty-two".