6466250569 has 9 divisors (see below), whose sum is σ = 6541490997. Its totient is φ = 6391868544.

The previous prime is 6466250551. The next prime is 6466250621. The reversal of 6466250569 is 9650526646.

The square root of 6466250569 is 80413.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 4020025 + 6462230544 = 2005^2 + 80388^2 .

It is not a de Polignac number, because 6466250569 - 2⁹ = 6466250057 is a prime.

It is a super-2 number, since 2×6466250569² = 83624792842185647522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6466250369) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7799647 + ... + 7800475.

It is an arithmetic number, because the mean of its divisors is an integer number (726832333).

Almost surely, 2^6466250569 is an apocalyptic number.

6466250569 is the 80413-rd square number.

6466250569 is the 40207-th centered octagonal number.

It is an amenable number.

6466250569 is a deficient number, since it is larger than the sum of its proper divisors (75240428).

6466250569 is an frugal number, since it uses more digits than its factorization.

6466250569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1852 (or 926 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 49.

The cubic root of 6466250569 is about 1863.0199686555.

Multiplying 6466250569 by its sum of digits (49), we get a square (316846277881 = 562891²).

The spelling of 6466250569 in words is "six billion, four hundred sixty-six million, two hundred fifty thousand, five hundred sixty-nine".