66382601 has 4 divisors (see below), whose sum is σ = 66486804. Its totient is φ = 66278400.

The previous prime is 66382559. The next prime is 66382607. The reversal of 66382601 is 10628366.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31584400 + 34798201 = 5620^2 + 5899^2 .

It is a cyclic number.

It is not a de Polignac number, because 66382601 - 2¹⁰ = 66381577 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66382607) 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, 51140 + ... + 52421.

It is an arithmetic number, because the mean of its divisors is an integer number (16621701).

Almost surely, 2^66382601 is an apocalyptic number.

It is an amenable number.

66382601 is a deficient number, since it is larger than the sum of its proper divisors (104203).

66382601 is a wasteful number, since it uses less digits than its factorization.

66382601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104202.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 66382601 is about 8147.5518408906. The cubic root of 66382601 is about 404.9033981865.

The spelling of 66382601 in words is "sixty-six million, three hundred eighty-two thousand, six hundred one".