66542842422 has 48 divisors (see below), whose sum is σ = 165609224352. Its totient is φ = 18915724800.

The previous prime is 66542842391. The next prime is 66542842423. The reversal of 66542842422 is 22424824566.

66542842422 is a `hidden beast` number, since 6 + 6 + 542 + 84 + 2 + 4 + 22 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66542842423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1315579 + ... + 1365222.

It is an arithmetic number, because the mean of its divisors is an integer number (3450192174).

Almost surely, 2^66542842422 is an apocalyptic number.

66542842422 is an abundant number, since it is smaller than the sum of its proper divisors (99066381930).

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

66542842422 is a wasteful number, since it uses less digits than its factorization.

66542842422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2681013 (or 2681010 counting only the distinct ones).

The product of its digits is 1474560, while the sum is 45.

The spelling of 66542842422 in words is "sixty-six billion, five hundred forty-two million, eight hundred forty-two thousand, four hundred twenty-two".