50665220651 has 4 divisors (see below), whose sum is σ = 50669818032. Its totient is φ = 50660623272.

The previous prime is 50665220633. The next prime is 50665220681. The reversal of 50665220651 is 15602256605.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50665220651 is a prime.

It is a super-2 number, since 2×50665220651² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50665220611) 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, 2282120 + ... + 2304213.

It is an arithmetic number, because the mean of its divisors is an integer number (12667454508).

Almost surely, 2^50665220651 is an apocalyptic number.

50665220651 is a deficient number, since it is larger than the sum of its proper divisors (4597381).

50665220651 is a wasteful number, since it uses less digits than its factorization.

50665220651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4597380.

The product of its (nonzero) digits is 108000, while the sum is 38.

The spelling of 50665220651 in words is "fifty billion, six hundred sixty-five million, two hundred twenty thousand, six hundred fifty-one".