5166120721 has 8 divisors (see below), whose sum is σ = 5239815680. Its totient is φ = 5092504992.

The previous prime is 5166120703. The next prime is 5166120731. The reversal of 5166120721 is 1270216615.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5166120721 - 2⁷ = 5166120593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5166120731) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 118336 + ... + 155998.

It is an arithmetic number, because the mean of its divisors is an integer number (654976960).

Almost surely, 2^5166120721 is an apocalyptic number.

It is an amenable number.

5166120721 is a deficient number, since it is larger than the sum of its proper divisors (73694959).

5166120721 is a wasteful number, since it uses less digits than its factorization.

5166120721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39615.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 5166120721 is about 71875.7310988904. The cubic root of 5166120721 is about 1728.7075025345.

The spelling of 5166120721 in words is "five billion, one hundred sixty-six million, one hundred twenty thousand, seven hundred twenty-one".