50067666661 has 4 divisors (see below), whose sum is σ = 50084353324. Its totient is φ = 50050980000.

The previous prime is 50067666647. The next prime is 50067666673. The reversal of 50067666661 is 16666676005.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25239676900 + 24827989761 = 158870^2 + 157569^2 .

It is a cyclic number.

It is not a de Polignac number, because 50067666661 - 2¹¹ = 50067664613 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 (50067666611) 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, 8338830 + ... + 8344831.

It is an arithmetic number, because the mean of its divisors is an integer number (12521088331).

Almost surely, 2^50067666661 is an apocalyptic number.

It is an amenable number.

50067666661 is a deficient number, since it is larger than the sum of its proper divisors (16686663).

50067666661 is a wasteful number, since it uses less digits than its factorization.

50067666661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16686662.

The product of its (nonzero) digits is 1632960, while the sum is 49.

The spelling of 50067666661 in words is "fifty billion, sixty-seven million, six hundred sixty-six thousand, six hundred sixty-one".