52661806 has 8 divisors (see below), whose sum is σ = 83150280. Its totient is φ = 24945048.

The previous prime is 52661797. The next prime is 52661809. The reversal of 52661806 is 60816625.

52661806 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×52661806² = 5546531622363272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52661809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 692881 + ... + 692956.

It is an arithmetic number, because the mean of its divisors is an integer number (10393785).

Almost surely, 2^52661806 is an apocalyptic number.

52661806 is a deficient number, since it is larger than the sum of its proper divisors (30488474).

52661806 is a wasteful number, since it uses less digits than its factorization.

52661806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385858.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 52661806 is about 7256.8454579108. The cubic root of 52661806 is about 374.8279056274.

The spelling of 52661806 in words is "fifty-two million, six hundred sixty-one thousand, eight hundred six".