5001661065550 has 24 divisors (see below), whose sum is σ = 9354487883832. Its totient is φ = 1989611028000.

The previous prime is 5001661065491. The next prime is 5001661065623. The reversal of 5001661065550 is 555601661005.

It is a super-2 number, since 2×5001661065550² (a number of 26 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 in 11 ways as a sum of consecutive naturals, for example, 276325816 + ... + 276343915.

It is an arithmetic number, because the mean of its divisors is an integer number (389770328493).

Almost surely, 2^{5001661065550} is an apocalyptic number.

5001661065550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

5001661065550 is a deficient number, since it is larger than the sum of its proper divisors (4352826818282).

5001661065550 is a wasteful number, since it uses less digits than its factorization.

5001661065550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552669924 (or 552669919 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 40.

The spelling of 5001661065550 in words is "five trillion, one billion, six hundred sixty-one million, sixty-five thousand, five hundred fifty".