52556661 has 8 divisors (see below), whose sum is σ = 77861760. Its totient is φ = 35037756.

The previous prime is 52556659. The next prime is 52556681. The reversal of 52556661 is 16665525.

It is a happy number.

It is not a de Polignac number, because 52556661 - 2¹ = 52556659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52556611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 973245 + ... + 973298.

It is an arithmetic number, because the mean of its divisors is an integer number (9732720).

Almost surely, 2^52556661 is an apocalyptic number.

It is an amenable number.

52556661 is a deficient number, since it is larger than the sum of its proper divisors (25305099).

52556661 is a wasteful number, since it uses less digits than its factorization.

52556661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1946552 (or 1946546 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 52556661 is about 7249.5972991608. The cubic root of 52556661 is about 374.5782779124.

The spelling of 52556661 in words is "fifty-two million, five hundred fifty-six thousand, six hundred sixty-one".