542225606666 has 4 divisors (see below), whose sum is σ = 813338410002. Its totient is φ = 271112803332.

The previous prime is 542225606617. The next prime is 542225606719. The reversal of 542225606666 is 666606522245.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 666606522245 = 5 ⋅133321304449.

It can be written as a sum of positive squares in only one way, i.e., 281891974225 + 260333632441 = 530935^2 + 510229^2 .

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 as a sum of consecutive naturals, namely, 135556401665 + ... + 135556401668.

Almost surely, 2^542225606666 is an apocalyptic number.

542225606666 is a deficient number, since it is larger than the sum of its proper divisors (271112803336).

542225606666 is a wasteful number, since it uses less digits than its factorization.

542225606666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271112803335.

The product of its (nonzero) digits is 6220800, while the sum is 50.

The spelling of 542225606666 in words is "five hundred forty-two billion, two hundred twenty-five million, six hundred six thousand, six hundred sixty-six".