542516666 has 4 divisors (see below), whose sum is σ = 813775002. Its totient is φ = 271258332.

The previous prime is 542516651. The next prime is 542516731. The reversal of 542516666 is 666615245.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 352876225 + 189640441 = 18785^2 + 13771^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135629165 + ... + 135629168.

Almost surely, 2^542516666 is an apocalyptic number.

542516666 is a deficient number, since it is larger than the sum of its proper divisors (271258336).

542516666 is a wasteful number, since it uses less digits than its factorization.

542516666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271258335.

The product of its digits is 259200, while the sum is 41.

The square root of 542516666 is about 23291.9871629709. The cubic root of 542516666 is about 815.5883771150.

The spelling of 542516666 in words is "five hundred forty-two million, five hundred sixteen thousand, six hundred sixty-six".