5166121521 has 8 divisors (see below), whose sum is σ = 7514358624. Its totient is φ = 3130982720.

The previous prime is 5166121487. The next prime is 5166121531. The reversal of 5166121521 is 1251216615.

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 5166121521 - 2¹⁹ = 5165597233 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5166121531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78274536 + ... + 78274601.

It is an arithmetic number, because the mean of its divisors is an integer number (939294828).

Almost surely, 2^5166121521 is an apocalyptic number.

It is an amenable number.

5166121521 is a deficient number, since it is larger than the sum of its proper divisors (2348237103).

5166121521 is a wasteful number, since it uses less digits than its factorization.

5166121521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156549151.

The product of its digits is 3600, while the sum is 30.

The square root of 5166121521 is about 71875.7366640510. The cubic root of 5166121521 is about 1728.7075917675.

The spelling of 5166121521 in words is "five billion, one hundred sixty-six million, one hundred twenty-one thousand, five hundred twenty-one".