50665697091 has 12 divisors (see below), whose sum is σ = 77488713432. Its totient is φ = 31790241216.

The previous prime is 50665697083. The next prime is 50665697123. The reversal of 50665697091 is 19079656605.

50665697091 is a `hidden beast` number, since 5 + 0 + 6 + 6 + 569 + 70 + 9 + 1 = 666.

It is not a de Polignac number, because 50665697091 - 2³ = 50665697083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (50665697041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 165574021 + ... + 165574326.

It is an arithmetic number, because the mean of its divisors is an integer number (6457392786).

Almost surely, 2^50665697091 is an apocalyptic number.

50665697091 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

50665697091 is a deficient number, since it is larger than the sum of its proper divisors (26823016341).

50665697091 is a wasteful number, since it uses less digits than its factorization.

50665697091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331148370 (or 331148367 counting only the distinct ones).

The product of its (nonzero) digits is 3061800, while the sum is 54.

The spelling of 50665697091 in words is "fifty billion, six hundred sixty-five million, six hundred ninety-seven thousand, ninety-one".