5155066721 has 8 divisors (see below), whose sum is σ = 5926784640. Its totient is φ = 4392168768.

The previous prime is 5155066691. The next prime is 5155066733. The reversal of 5155066721 is 1276605515.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5155066721 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5155066771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2203736 + ... + 2206073.

It is an arithmetic number, because the mean of its divisors is an integer number (740848080).

Almost surely, 2^5155066721 is an apocalyptic number.

It is an amenable number.

5155066721 is a deficient number, since it is larger than the sum of its proper divisors (771717919).

5155066721 is a wasteful number, since it uses less digits than its factorization.

5155066721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4409983.

The product of its (nonzero) digits is 63000, while the sum is 38.

The square root of 5155066721 is about 71798.7933115871. The cubic root of 5155066721 is about 1727.4736445248.

The spelling of 5155066721 in words is "five billion, one hundred fifty-five million, sixty-six thousand, seven hundred twenty-one".