50406661 has 4 divisors (see below), whose sum is σ = 51044800. Its totient is φ = 49768524.

The previous prime is 50406659. The next prime is 50406667. The reversal of 50406661 is 16660405.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 50406661 - 2¹ = 50406659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50406667) 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, 318951 + ... + 319108.

It is an arithmetic number, because the mean of its divisors is an integer number (12761200).

Almost surely, 2^50406661 is an apocalyptic number.

It is an amenable number.

50406661 is a deficient number, since it is larger than the sum of its proper divisors (638139).

50406661 is an equidigital number, since it uses as much as digits as its factorization.

50406661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638138.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 50406661 is about 7099.7648552611. The cubic root of 50406661 is about 369.3992222552.

The spelling of 50406661 in words is "fifty million, four hundred six thousand, six hundred sixty-one".