542666246 has 4 divisors (see below), whose sum is σ = 813999372. Its totient is φ = 271333122.

The previous prime is 542666237. The next prime is 542666249. The reversal of 542666246 is 642666245.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542666249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135666560 + ... + 135666563.

It is an arithmetic number, because the mean of its divisors is an integer number (203499843).

Almost surely, 2^542666246 is an apocalyptic number.

542666246 is a deficient number, since it is larger than the sum of its proper divisors (271333126).

542666246 is a wasteful number, since it uses less digits than its factorization.

542666246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271333125.

The product of its digits is 414720, while the sum is 41.

The square root of 542666246 is about 23295.1979171674. The cubic root of 542666246 is about 815.6633268857.

Subtracting 542666246 from its reverse (642666245), we obtain a palindrome (99999999).

The spelling of 542666246 in words is "five hundred forty-two million, six hundred sixty-six thousand, two hundred forty-six".