52657666 has 8 divisors (see below), whose sum is σ = 79129980. Its totient is φ = 26281008.

The previous prime is 52657621. The next prime is 52657669. The reversal of 52657666 is 66675625.

It can be written as a sum of positive squares in 2 ways, for example, as 36857041 + 15800625 = 6071^2 + 3975^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (52657669) 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, 22521 + ... + 24748.

Almost surely, 2^52657666 is an apocalyptic number.

52657666 is a deficient number, since it is larger than the sum of its proper divisors (26472314).

52657666 is a wasteful number, since it uses less digits than its factorization.

52657666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47828.

The product of its digits is 453600, while the sum is 43.

The square root of 52657666 is about 7256.5602043944. The cubic root of 52657666 is about 374.8180830234.

The spelling of 52657666 in words is "fifty-two million, six hundred fifty-seven thousand, six hundred sixty-six".