52666720 has 24 divisors (see below), whose sum is σ = 124425504. Its totient is φ = 21066624.

The previous prime is 52666717. The next prime is 52666741. The reversal of 52666720 is 2766625.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164424 + ... + 164743.

It is an arithmetic number, because the mean of its divisors is an integer number (5184396).

Almost surely, 2^52666720 is an apocalyptic number.

It is an amenable number.

52666720 is an abundant number, since it is smaller than the sum of its proper divisors (71758784).

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

52666720 is a wasteful number, since it uses less digits than its factorization.

52666720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329182 (or 329174 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 52666720 is about 7257.1840268798. The cubic root of 52666720 is about 374.8395639631.

The spelling of 52666720 in words is "fifty-two million, six hundred sixty-six thousand, seven hundred twenty".