542450666 has 4 divisors (see below), whose sum is σ = 813676002. Its totient is φ = 271225332.

The previous prime is 542450651. The next prime is 542450677. The reversal of 542450666 is 666054245.

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., 527850625 + 14600041 = 22975^2 + 3821^2 .

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, 135612665 + ... + 135612668.

Almost surely, 2^542450666 is an apocalyptic number.

542450666 is a deficient number, since it is larger than the sum of its proper divisors (271225336).

542450666 is a wasteful number, since it uses less digits than its factorization.

542450666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271225335.

The product of its (nonzero) digits is 172800, while the sum is 38.

The square root of 542450666 is about 23290.5703236310. The cubic root of 542450666 is about 815.5553022380. Note that the first 3 decimals are identical.

The spelling of 542450666 in words is "five hundred forty-two million, four hundred fifty thousand, six hundred sixty-six".