542666244 has 12 divisors (see below), whose sum is σ = 1266221264. Its totient is φ = 180888744.

The previous prime is 542666237. The next prime is 542666249. The reversal of 542666244 is 442666245.

It is a tau number, because it is divible by the number of its divisors (12).

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22611082 + ... + 22611105.

Almost surely, 2^542666244 is an apocalyptic number.

It is an amenable number.

542666244 is an abundant number, since it is smaller than the sum of its proper divisors (723555020).

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

542666244 is a wasteful number, since it uses less digits than its factorization.

542666244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45222194 (or 45222192 counting only the distinct ones).

The product of its digits is 276480, while the sum is 39.

The square root of 542666244 is about 23295.1978742401. The cubic root of 542666244 is about 815.6633258836.

Subtracting from 542666244 its reverse (442666245), we obtain a palindrome (99999999).

The spelling of 542666244 in words is "five hundred forty-two million, six hundred sixty-six thousand, two hundred forty-four".