50001661166 has 4 divisors (see below), whose sum is σ = 75002491752. Its totient is φ = 25000830582.

The previous prime is 50001661123. The next prime is 50001661189. The reversal of 50001661166 is 66116610005.

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

It is a super-2 number, since 2×50001661166² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12500415290 + ... + 12500415293.

It is an arithmetic number, because the mean of its divisors is an integer number (18750622938).

Almost surely, 2^50001661166 is an apocalyptic number.

50001661166 is a deficient number, since it is larger than the sum of its proper divisors (25000830586).

50001661166 is a wasteful number, since it uses less digits than its factorization.

50001661166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25000830585.

The product of its (nonzero) digits is 6480, while the sum is 32.

The spelling of 50001661166 in words is "fifty billion, one million, six hundred sixty-one thousand, one hundred sixty-six".