52661407 has 8 divisors (see below), whose sum is σ = 55742960. Its totient is φ = 49610880.

The previous prime is 52661387. The next prime is 52661417. The reversal of 52661407 is 70416625.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52661407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52661417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4218 + ... + 11095.

It is an arithmetic number, because the mean of its divisors is an integer number (6967870).

Almost surely, 2^52661407 is an apocalyptic number.

52661407 is a deficient number, since it is larger than the sum of its proper divisors (3081553).

52661407 is a wasteful number, since it uses less digits than its factorization.

52661407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15513.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 52661407 is about 7256.8179665746. The cubic root of 52661407 is about 374.8269589786.

The spelling of 52661407 in words is "fifty-two million, six hundred sixty-one thousand, four hundred seven".