52666665 has 16 divisors (see below), whose sum is σ = 87931008. Its totient is φ = 26867456.

The previous prime is 52666637. The next prime is 52666667. The reversal of 52666665 is 56666625.

It is a cyclic number.

It is not a de Polignac number, because 52666665 - 2¹² = 52662569 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (52666667) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 75984 + ... + 76673.

It is an arithmetic number, because the mean of its divisors is an integer number (5495688).

Almost surely, 2^52666665 is an apocalyptic number.

It is an amenable number.

52666665 is a deficient number, since it is larger than the sum of its proper divisors (35264343).

52666665 is a wasteful number, since it uses less digits than its factorization.

52666665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152688.

The product of its digits is 388800, while the sum is 42.

The square root of 52666665 is about 7257.1802375303. The cubic root of 52666665 is about 374.8394334811.

The spelling of 52666665 in words is "fifty-two million, six hundred sixty-six thousand, six hundred sixty-five".