538666656 has 48 divisors (see below), whose sum is σ = 1542548448. Its totient is φ = 163232000.

The previous prime is 538666649. The next prime is 538666673. The reversal of 538666656 is 656666835.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-3 number, since 3×538666656³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 538666599 and 538666608.

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, 253995 + ... + 256106.

It is an arithmetic number, because the mean of its divisors is an integer number (32136426).

Almost surely, 2^538666656 is an apocalyptic number.

It is an amenable number.

538666656 is an abundant number, since it is smaller than the sum of its proper divisors (1003881792).

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

538666656 is a wasteful number, since it uses less digits than its factorization.

538666656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510125 (or 510117 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 51.

The square root of 538666656 is about 23209.1933509116. The cubic root of 538666656 is about 813.6545006511.

The spelling of 538666656 in words is "five hundred thirty-eight million, six hundred sixty-six thousand, six hundred fifty-six".