50166555661 has 4 divisors (see below), whose sum is σ = 50168025472. Its totient is φ = 50165085852.

The previous prime is 50166555631. The next prime is 50166555667. The reversal of 50166555661 is 16655566105.

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 50166555661 - 2⁵ = 50166555629 is a prime.

It is a super-2 number, since 2×50166555661² (a number of 22 digits) 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 (50166555667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 682461 + ... + 752386.

It is an arithmetic number, because the mean of its divisors is an integer number (12542006368).

Almost surely, 2^50166555661 is an apocalyptic number.

It is an amenable number.

50166555661 is a deficient number, since it is larger than the sum of its proper divisors (1469811).

50166555661 is a wasteful number, since it uses less digits than its factorization.

50166555661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1469810.

The product of its (nonzero) digits is 810000, while the sum is 46.

The spelling of 50166555661 in words is "fifty billion, one hundred sixty-six million, five hundred fifty-five thousand, six hundred sixty-one".