5266721671 has 12 divisors (see below), whose sum is σ = 5458777272. Its totient is φ = 5079589424.

The previous prime is 5266721651. The next prime is 5266721687. The reversal of 5266721671 is 1761276625.

It is not a de Polignac number, because 5266721671 - 2¹³ = 5266713479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5266721641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 170220 + ... + 198766.

It is an arithmetic number, because the mean of its divisors is an integer number (454898106).

Almost surely, 2^5266721671 is an apocalyptic number.

5266721671 is a deficient number, since it is larger than the sum of its proper divisors (192055601).

5266721671 is an equidigital number, since it uses as much as digits as its factorization.

5266721671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28718 (or 28659 counting only the distinct ones).

The product of its digits is 211680, while the sum is 43.

The square root of 5266721671 is about 72572.1824875069. The cubic root of 5266721671 is about 1739.8566040943.

The spelling of 5266721671 in words is "five billion, two hundred sixty-six million, seven hundred twenty-one thousand, six hundred seventy-one".