52661405 has 8 divisors (see below), whose sum is σ = 65232384. Its totient is φ = 40770000.

The previous prime is 52661387. The next prime is 52661417. The reversal of 52661405 is 50416625.

52661405 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 not a de Polignac number, because 52661405 - 2⁶ = 52661341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 169721 + ... + 170030.

It is an arithmetic number, because the mean of its divisors is an integer number (8154048).

Almost surely, 2^52661405 is an apocalyptic number.

It is an amenable number.

52661405 is a deficient number, since it is larger than the sum of its proper divisors (12570979).

52661405 is a wasteful number, since it uses less digits than its factorization.

52661405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339787.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 52661405 is about 7256.8178287732. The cubic root of 52661405 is about 374.8269542335.

The spelling of 52661405 in words is "fifty-two million, six hundred sixty-one thousand, four hundred five".