52666538 has 16 divisors (see below), whose sum is σ = 80131464. Its totient is φ = 25958400.

The previous prime is 52666513. The next prime is 52666553. The reversal of 52666538 is 83566625.

It can be written as a sum of positive squares in 4 ways, for example, as 48678529 + 3988009 = 6977^2 + 1997^2 .

It is a junction number, because it is equal to n+sod(n) for n = 52666495 and 52666504.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 77456 + ... + 78132.

Almost surely, 2^52666538 is an apocalyptic number.

52666538 is a deficient number, since it is larger than the sum of its proper divisors (27464926).

52666538 is a wasteful number, since it uses less digits than its factorization.

52666538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177.

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

The square root of 52666538 is about 7257.1714875701. The cubic root of 52666538 is about 374.8391321858.

The spelling of 52666538 in words is "fifty-two million, six hundred sixty-six thousand, five hundred thirty-eight".