50666661 has 16 divisors (see below), whose sum is σ = 76294720. Its totient is φ = 33222960.

The previous prime is 50666657. The next prime is 50666669. The reversal of 50666661 is 16666605.

It is not a de Polignac number, because 50666661 - 2² = 50666657 is a prime.

It is a super-2 number, since 2×50666661² = 5134221073777842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50666669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13735 + ... + 17028.

It is an arithmetic number, because the mean of its divisors is an integer number (4768420).

Almost surely, 2^50666661 is an apocalyptic number.

It is an amenable number.

50666661 is a deficient number, since it is larger than the sum of its proper divisors (25628059).

50666661 is a wasteful number, since it uses less digits than its factorization.

50666661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30833 (or 30827 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 50666661 is about 7118.0517699719. The cubic root of 50666661 is about 370.0332597323.

The spelling of 50666661 in words is "fifty million, six hundred sixty-six thousand, six hundred sixty-one".